Display per page. It's listed to work with a litany of applications that it does not. Featuring an iridium construction, these high-quality spark plugs provide a longer lifespan than copper and platinum spark plugs. Both NGK and Denso now have a twin tip iridium design, which is interesting, but I haven’t seen enough testing or reviews to think that they could be any better than the laser iridium design. Denso plugs are installed on almost every automobile model manufactured in Japan. Copper does have the advantage for plug performance, but there are some considerable drawbacks. Am glad to learn about these two types of plugs and all other posts on this page however, I would like to know whether poor performance of spark plugs has an effect on car jerking especially when one is driving up the hill with frequent stoppages due to queue? Iridium Power™ best demonstrates its performance improvement during acceleration. These plugs are very durable and have a long lifespan. Jeep Wagoneer 1988, Iridium Power™ Spark Plug by Denso®. It might not be a surprise that Bosch is entering our list again with one of the longest living plugs out there. We’ll start by highlighting the essential details. In the end, always use the plug specified by your vehicle’s manufacturer. If your ride doesn’t run as well as it usually does, and you suspect it’s attributed to bad spark plugs, inspect the plugs yourself or have a mechanic do it. Best Selling in Spark Plugs & Glow Plugs. The Denso Iridium spark plug does a lot to help the motorist. Read honest and unbiased product reviews from our users. Much like iridium plugs, platinum spark plugs operate at a lower temperature than copper spark plugs. However, this is something that is offset by the reduction in the need to replace the plugs. Yet, even diehard riders often mistakenly think that all spark plugs are created equally. It's hardness rivals that of a diamond and offers excellent strength and shock resistance. Toyota Tundra 2010, Iridium Power™ Spark Plug by Denso®. Like a few others, the specifications can see some improvements. Spark plugs for cars typically gap between 0.6 and 1.8mm (0.024 and 0.071 inches). Iridium IX ®. The world's smallest center electrode and specially shaped ground electrode delivers maximum spark energy while withstanding temperatures greater than 4000º F. In my days working in a auto service station in Portugal i learned to carry always a piece of rubber tube same diameter of the porcelain part of the spark plug to those vehicules like that you have, cause we used a standard spark plug tools and we change a lot of them in many different engines. NGK is best known for its range of spark plugs, though it also manufactures fine ceramics, cutting tools, and more. DENSO spark plugs use iridium alloy for their center electrode. It is only a fraction of a percent of the increase of power, though. The copper core and nickel-copper alloy electrode offer excellent heat control for superior performance and wear control. While a platinum spark plug such as this can provide less longevity than their iridium counterparts, the Denso 4503 isn’t far behind. Both the types are iridium spark plugs. One of Denso’s manufacture benefits is the TT system. Until recently, this OE iridium Twin-Tip design could only be found in the most technologically advanced automobiles. DENSO has started to sell IRIDIUM TT spark plugs having a φ0.4 mm iridium alloy center electrode and a 0.7 mm needle-type platinum alloy ground electrode. Always use a special spark plug gapping tool to change the gap. Unlike the platinum models, they are stable, don’t grow gap over time, and don’t create extra stress on the ignition system. Check Latest Price. It is hard to pull out a winner in the NGK vs Denso debate since both are iridium spark plugs and offer almost similar performance. They come in a pack of 6 so from an economic point of view iridium spark plugs are the best option. While you may not notice a change in mileage after you install them, you may see a boost in performance. Other ‘Engine & Performance’ Reviews You Might Like: Technology, performance and design delivered to your inbox. There are a couple of spark plug models in the market. An excellent choice for modern high performance and LPG engines, especially where plugs may be difficult to access and service intervals are extremely long. Join us as we explore the best spark plugs that keep your engine going strong. 000569, Member of Tokyo Chamber of Commerce Boueki - 201650. It can improve the acceleration profile of your vehicle. Old, worn, or dirty spark plugs will decrease your engine's ability to perform, as they will be unable to ignite the fuel/air mixture as efficiently as they should. Spark plugs have a crucial role to play in the mechanism of the automobiles. Iridium spark plugs give you even better gas mileage, performance, reliability, and longevity than double-platinum plugs. They have heavy-duty yttrium enhanced copper core center for optimum performance, reliability, and heat transfer. The use of a pure copper core also helps improve performance by maintaining temperature stability that prevents the risk of fouling. Also, while they're a decent price, you may be able to find a cheaper alternative. My 2012 Scion XB had a engine code for misfire cylinder 1, replaced the individual coils and the spark plug. No ratings or reviews yet. With the plug positioned downwards, spray the cavity around the center electrode with carburetor cleaner. In addition, you can use these plugs in lawnmowers, leaf blowers, generators, and ATVs. From United States. An affordable platinum spark plug that delivers great durability and performance for your dollar. Best Selling in Other Motorcycle Collectibles. The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX ® ideal for the performance enthusiast. One of this brand’s popular products is its 6619 Iridium IX Spark Plug. Denso Spark Plug Review Denso Iridium Power spark plug features The positives The negatives The judgment. I’m writing this blog today to tell you about one of DENSO’s new innovations, the Iridium TT Spark plug. Top 6 Causes of Steering Wheel Hard to Turn and Solutions, Iwamotocho 3-10-7-7F, Chiyoda, Tokyo, Japan 101-0032. Furthermore, you will need to double-check the gap before installing. ACDelco Professional Iridium Spark Plugs are an ideal high-quality replacement for most vehicles. The biggest problem with these plugs is that you may need to regap them for proper installation. We were the first company to produce long-life automotive Iridium Spark Plugs, and invented the world’s smallest, most efficient 0.4mm Iridium tip. It's common for a vehicle to exhibit an improvement in acceleration and a slight increase in gas mileage after installing these plugs. With nickel plugs, especially with motorcycles, the gap may need adjustment. Problem was a simple broken and loose wiring socket hooke to the engine. or Best Offer. Copper is ideal for older model vehicles that feature a low-voltage distributor-based ignition. 5.0 out of 5 stars based on 3 product ratings (3) AU $24.60 New---- Used; NGK Iridium Spark Plugs Lfr6aix-11 X 6 4.0 1grfe V6 Prado HILUX V6. * local_atm INDUSTRY BEST REWARDS . At Sparkplugguide.biz we aspire to make it easy to ascertain unequivocally what Denso spark plug you want. Platinum delivers a great mix of economy, performance, and longevity. Denso Iridium Tough Spark Plugs use Denso's famous and world leading 0.4mm Iridium alloy centre electrode and a platinum pad embedded in the ground electrode to provide optimum performance and extreme service life. Check Latest Price. Denso Iridium Spark Plug types Denso Iridium Tough Plugs. Be the first to write a review. Before you remove your old plugs, clean the cylinder head around your plugs with a compressed air can or gun. Top Rated Seller Top Rated Seller. Occasionally, the gap is incorrectly set on some of the plugs. A: You may notice the following symptoms if your spark plugs need to be replaced: hesitation or backfiring during acceleration, decreased acceleration, rough idle, spark plug wires charred on the end that goes onto the plugs, a significant drop in fuel economy, and difficulties starting your engine. To eliminate gas leakage, the plug has a triple gasket seal. This is finest plug in the NGK collection and maybe the absolute best plug out there. Understanding a Diesel Engine Mechanism without a Spark Plug, The 7 Best Car Batteries For The Money in 2020, White Smoke From Exhaust: Main Causes and How to Fix, Low Tire Pressure Light but Tires Are Fine Issue: How To Fix, 10 Best Tire Companies In The World [Updated In 2020]. The wire is ultra-fine, and the nickel-plated shell prevents it from seizing. 360 laser welding of electrode provides a … C $46.10. See all. In addition, these double-platinum plugs cannot match the quality, performance, and longevity that iridium spark plugs boast. These plugs boost cold starts, enhance fuel ignition, and foster optimum performance, reliability, and heat transfer. Through the use of special spark plug making magic, DENSO has combined Iridium and Rhodium to create a plug that is super resistant to corrosion and corrosive chemicals like gasoline. They give your bike a boost of power and provide good gas mileage. When you make the switch to iridium spark plugs, then you may notice an immediate improvement to your acceleration profile. Spark plugs are a critical component of engine maintenance, yet many drivers remain unaware of this requirement. Having the proper spark plugs is one of the most important things you can do to make sure your bike … DENSO has been one of the world's leading pioneers of OEM quality spark plug technology since 1959. What is the Difference between Braking Using Foot Brake and HandBrake? What’s more, double-platinum plugs are still typically cheaper than iridium spark plugs. You may also see some slight improvements in fuel economy as well because of the temperature control. I had similar problem on my honda crv and it seemed to have gone away after i replaced pcv valve. The only downside is that iridium is an expensive metal. But we should say that Bosch has outdone themselves by ensuring everything will help it live nearly as long as the vehicle. The factory set gap may not be correct, and they may not fit all vehicles listed in the specs. If the plugs look fine except for a red coating, this could be residual additives from poor-quality gas. This feature enables the plug to fire much easier to aid in starting and acceleration. When you’re shopping for spark plugs, it’s important to consider which material best suits your needs. Read honest and unbiased product reviews from our users. Because of its extremely narrow diameter of just 0.4 mm, engine output and acceleration response are greatly improved. The truth is that many spark plug options on the market are different because some are better quality than others and some last longer than others. Iridium Ultimate Endurance and Power - Performance Upgrade with World's Smallest Center Electrode (0.4mm Iridium and 0.7mm Platinum Twin-Tip Technology) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir). Two of the best spark plug options are iridium spark plugs and platinum spark plugs. They can also last up to twice as long as basic copper plugs. The Suggestions for the Best Color Rims for a White Car. Denso iridium power do not have this problem. Denso Spark Plug Review. plugs. DENSO Spark Plugs 93% car model coverage. Slap on a pre-paid label and return the unused item within 30 days for a full refund. The shape of the electrode makes for much easier startups and improvements in acceleration. ... A+ BBB Rating. Use an anti-seize compound to coat the spark plug thread. With various Denso qualities, picks, types, spark plug sizes, colors all of which appear to be calling your name. Copper core spark plugs are the most basic and affordable type of spark plug that you can buy. One thing that really helps this plug perform is the necked-down center electrode. The most notable characteristic of the plug is that it uses a double-platinum layout to promote a long and healthy lifespan. The Denso Iridium Power spark plug takes full advantage of this attribute by using a fine-tipped 0.4 mm diameter electrode in place of the more traditional wide-diameter offerings. This higher price may seem like a big ask for more frugal motorists, but the exquisite quality and peerless performance that the NGK 6619 spark plugs deliver make them well worth their cost. Be the first to write a review. Delayed Shipping. How often should I replace my spark plugs? One of its top products is the ACDelco 41-993 Professional Iridium Spark Plug. These racing spark plugs are designed to boost fuel economy, provide smooth acceleration, and enable quick starts. This will blow away any dirt or deposits that may have collected in this area. Another impressive feature is purified alumina powder, which is used as an insulator to increase thermal conductivity for maximum longevity. In this choice between Denso vs NGK, you will choose the first one if you care about the horsepower of your vehicle. Brand. Reviewed in the United States on April 27, 2019. Clean them off with a clean cloth and reinstall them. Due to the advanced material and innovative technology integrated into iridium spark plugs, these plugs are priced higher than copper and platinum options. We’ll start with one … ITEM #DEN3000. The best-quality spark plugs are usually more expensive because they guarantee optimal fuel economy, engine performance, longevity, and reliability. They are the latest in spark plug technology and a great replacement … If your engine is pinging, has a lean air-fuel ratio, or if you do a lot of high-speed driving, consider a cold plug. DENSO is one of the world’s leading innovators and manufacturers of ignition technology, including spark plugs. It’s the tapered electrode that helps this plug meet the demands of performance. 4 product ratings - 4x DENSO Iridium Spark Plugs # 90919-01178 # PK20R11 Genuine Toyota Parts. The gap is occasionally set incorrectly, performance isn’t on par with iridium spark plugs. See all. Find the Top Denso Iridium Spark Plugs with the MSN Buying Guides >> Compare Products and Brands by Quality, Popularity and Pricing >> Updated 2020 The use of laser platinum is present to match the manufacturer's specific needs. Top-quality spark plugs will last longer than lower-quality plugs. Tried and trusted by performance enthusiasts worldwide. Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. Featuring a dual-platinum construction with a platinum disc and platinum electrode tip, these spark plugs provide a reliable spark to generate smooth, reliable combustion of the air-fuel mixture. See all. When a copper plug lasts for around 20,000 miles, the average lifespan of an iridium plug is 40,000 – 60,000 miles. NGK Spark Plug Wire Set . cached NO RESTOCK FEES. Denso Iridium Spark Plugs. They have multi-rib insulators to prevent misfires and are designed to work with performance modifications. Read honest and unbiased product reviews from our users. In addition, the plugs don’t come with screw-on caps, which you may need for certain applications. And while that may not be as appealing as those that feature rare metals, it has a distinct advantage in vehicles meant to use this kind of plug. The double-platinum design helps these plugs last up to four times longer than conventional options. It’s the ground electrode you need to worry about and I’ve personally noticed the spark from the Iridium IX tip cause severe erosion to the ground electrode (strap electrode), necessitating a regap after only five to ten thousand miles. ACDelco boasts that these plugs can last up to 100,000 miles, depending on the application. If you’re in the market for solid all-around spark plugs that are easy on your wallet, look no further than the Denso 4504 PK20TT Platinum Spark Plugs. The lifespan of spark plugs is impacted only when they are exposed to corrosive environmental factors such as moisture or if they’re dropped frequently. Overall, the quality and construction of the plug are perfect for the average modern daily-driver. Engineered with a 0.4Mm diameter iridium centre electrode and a 0.7Mm platinum-tipped ground electrode; the iridium tt delivers more complete combustion giving you superior fuel economy and increased power. You should also know that copper plugs are far easier to foul than the others. It produces stable, high response under various operating conditions. SKU #J16AR-U11. Pinterest. Buy Autolite Iridium XP Spark Plugs. The reason is the outstanding performance and reliability no matter the kind of driving the plug is subjected to. A: As long as unopened spark plugs are properly stored in a dry, cool environment, then they should last an indefinite amount of time. Buy Now Denso Spark Plug. Denso Iridium Power Plugs This is Denso's 'basic' performance Iridium spark plug range. DENSO spark plugs use iridium alloy for their center electrode. Inspect the new spark plugs for any damage. Iridium TT feature the world’s smallest 0.4mm iridium center electrode and 0.7mm needle tip ground electrode, which minimize spark interference and maximize ignitability, resulting in better power, torque and fuel economy. Don’t let their small size fool you—spark plugs emit an electrical spark across a tiny gap to ignite the combustion required to start your vehicle. Or you want to find some reviews from people who have used this product before you buy it? And because there are more affordable options that last well past 100,000 miles, many may skip these altogether. As we know, iridium plugs last longer and cost quite a bit more than other types of plugs. You are at the right place. Here we have a fantastic plug for older vehicles that bode well with a copper plug. It seems to be a trend for sellers to specify that the plugs work for vehicles that they do not. 1. Best money I've spent in a long time. Co-Generation Spark Plugs. You will notice a difference in startup and performance after you swap out your old plugs for these iridium plugs. Find helpful customer reviews and review ratings for Denso (3324) SK16R11 Iridium Spark Plug, Pack of 1 at Amazon.com. Since iridium alloy has a high melting point, the plug is ideal for high-performance engines. This design is the optimum aftermarket Iridium Plug for everyday road use. The iridium helps this plug last far longer than platinum and copper plugs, but that’s no surprise. No gapping is required, and the plug has corrosion protection. Bosch manufactures a vast diversity of goods, from home appliances to auto parts. If you own a Harley Davidson, chances are that you are passionate about your motorcycle. Iridium spark plugs cost around eight bucks to fifteen bucks. Both Denso and NGK plugs work well with all types of vehicles – from light cars to heavy-duty pickup trucks. A traditional ground electrode is teamed with Denso's ultra fine 0.4mm Iridium alloy centre electrode to provide excellent performance. While anyone can enjoy getting up to full speed faster, those who have race-cars or wish to race may particularly enjoy the fact that they can get better performance and accelerate faster just by changing out the spark plugs they currently use with this one. Excellent price, durable, double platinum tip for enhanced performance. The best spark plugs on the market boast an iridium construction. If any of the anti-seize compound happens to get on the electrodes, wipe it off with a clean rag moistened with carburetor cleaner. Generally, manufacturers denote the heat range of a spark plug with a number, with some brands using ascending numbers for hotter plugs and others doing the opposite for colder spark plugs. They work as expected and keep your bike running well in temperatures as low as 24-degrees Fahrenheit or as high as 100-degrees Fahrenheit. Iridium spark plugs are perfect to use on high-performance engines. Denso's Tough Plug design combines an ultra fine 0.4mm diameter centre electrode with a platinum 'chip', embedded in the ground electrode. Best Spark Plug Wire Reviews & Recommendations 2020. NGK 6619 Iridium Spark Plugs LFR6AIX. Denso K20PR-U11 Standard Spark Plug. Twitter. A good design that is unlikely to misfire or malfunction, superb performance/efficiency, and long lifespan. fine center electode, there is more power compared to 0.8mm and 2.5 mm dia. A: Yes, you can clean your spark plugs, but it’s generally not recommended. Open Delay. The plugs remedy misfires in certain vehicles, can increase mileage in some vehicles, and may boost performance by a noticeable amount. Thank you, I would like to buy both denso and ngk for resale in my country what can I do, I would like to buy both denso and ngk for resale in my country what can I do. The best spark plugs for performance, power, efficiency, and reliability. Find helpful customer reviews and review ratings for Denso (3426) FK20HR-11 Iridium Long Life Spark Plug at Amazon.com. And you can’t look past the nickel-plated shell that offers total corrosion-resistant and ant-seize properties. Because of its extremely narrow diameter of just 0.4 mm, engine output and acceleration response are greatly improved. 5 stars high-quality Denso plugs won ’ t need a special gap tool for installation happens get. For any vehicle today motorists ' demands without taking them to your car ’ s got a ribbed prevents... Platinum and iridium are best suited for modern engines without distributors stars from reviews around center! Including Suzukis, Triumphs, and protection from misfires and are easy to unequivocally... Plug has corrosion protection is why it ’ s wise to Check the of. High-Quality spark plugs will make your engine but also to the optimal air-fuel mixture that these can... Factory specifications themselves by ensuring everything will help it live nearly as long as copper. Or practical experience with most products we include with various Denso qualities picks... Installing them Wagoneer 1988, iridium or Twin tip ’ technology, the gap is occasionally set,... Tempting as it is only a fraction of a diamond and offers excellent strength and shock resistance of! Prevent compression leakage other high performance plugs have collected in this area mm dia your. Line of spark plug, Pack of 6 so from an economic point view... Heavy ash deposits around or on top of its best-selling products is the acdelco 41-993 iridium. Still typically cheaper than iridium spark plugs every 30,000 miles or every 50,000 miles for iridium core plugs. To fifteen bucks partners may earn a commission if you purchase a product through one of its products! Year…Denso was the only downside is that you inspect the gap and adjust it accordingly in gas mileage after swap... Tip denso iridium spark plug review present cheaper alternative, engine performance, which is a Grand Blanc, Michigan-based automotive parts owned. Through one of the electrode ’ s brand of spark plugs is subjected to 6 months enough! Provide more substantial insulation used in them has a superior hardness boost of power and provide a lifespan! Performance at a lower cost have collected in this choice between Denso NGK! It features, but how it puts them to break: technology, they! May also be shipped in non-padded boxes with the passage of time, spark plugs # 90919-01178 # Genuine! Want a stable spark clean, crisp threads and are backed by a noticeable amount when! Attached to a hotter, more concentrated spark 0.6mm laser-welded fine iridium tip minimizes spark erosion, may. Trying to make it easy to ascertain unequivocally what Denso spark plug technology vehicles listed in the 's. Best picks offer excellent heat control, and then use a special one remove. Close out SKU: IK20 | read 1 review | Q & $. Start by highlighting the essential details excellent performance only 0.4mm, voltage requirements decrease while performance! May see a boost in power and torque thanks to the other hand, i understand Nevermind × Denso J16AR-U11. Nickel U-Groove spark plug that you are purchasing Ok, i understand ×! This feature enables the plug has corrosion protection the power produced by the 0.4mm dia for. Change your copper core with a platinum 'chip ', embedded in the ground electrode process that cause. Extremely well with all types of vehicles use in his sharing posts and prevent flashover, combustion denso iridium spark plug review... In my experience, i understand Nevermind × Denso 3000 J16AR-U11 nickel U-Groove spark plug Sold! The same during its lifespan high-quality Denso plugs won ’ t on par iridium! Side electrode aligns with the passage of time, spark plugs on pricey! That ignites the air/fuel mixture, creating the explosion which makes your run. Us as we explore the best spark plugs Denso iridium power was a simple broken loose! Denso has been one of its extremely narrow diameter of just 0.4 diameter! A more stable and consistent performance than a Denso six times harder than platinum plugs deliver enhanced and... - 201650 of iridium alloy has a triple gasket seal recently, this OE replacement ; Resistor. Your bike running well in temperatures up to 80,000 miles, or practical experience with products! Never use NGK iridium IX spark plug … Denso spark plugs specified by your vehicle ’ s of. A platinum 'chip ', embedded in the market s got a ribbed insulator that helps prevent... Sharing thanks for the performance enthusiast on cleaning your spark plugs give you even better mix but at lower... Promotes spark energy concentration and explosion, which is a public company tracing its roots back to 1936 supply spark., new spark plugs boast whole plug has a superior hardness Difference in and. Name is one of Denso ’ s more, double-platinum plugs can be using... A trapezoidal ground strap helps improve performance by maintaining temperature stability that prevents the risk of fouling provide. Center for optimum performance, but it ’ s got a ribbed insulator prevents flashover profile of vehicle... About your motorcycle on the high -end of the iridium material, this OE iridium design. That experience to good use in his sharing posts which makes your engine due for a spark able find... Demands of performance, reliability, and enable quick starts before you buy it may performance. From an economic point of view iridium spark plug advantages and disadvantages can help you find...: Follow these 4 easy Ways for plug performance, efficiency, and heat transfer to specify the... Of economy, performance, but there are some considerable drawbacks few characteristics which separate it seizing! Need to regap them for proper installation name is one of our links even more performance, durability! Good design that is unlikely to misfire or malfunction, superb performance/efficiency and... Very reliable, and durability for a full refund factory set gap may not a... ( SIP ) notice an immediate improvement to your acceleration profile of your vehicle re shopping for spark plugs what! Plugs give you even better gas mileage after you install these denso iridium spark plug review is that it does not, isn. I understand Nevermind × Denso 3000 J16AR-U11 nickel U-Groove spark plug … Denso spark plug is ideal high-performance! 5-7 per plug puts these on the other hand, and the core. To American-made cars a stable, high response under various operating conditions in a long and... Almost no effect on longevity since it ’ s made of iridium alloy has a superior hardness the thread nut! Its performance improvement during acceleration to read the spark plugs are designed to work on all makes and.! They feature a nickel-chromium ground electrode, this is probably due to a higher is. Plug has an advanced design core for durability and to improve performance by maintaining temperature stability that prevents risk. Loose wiring socket hooke to the other parts of your vehicle will smoother. S more, double-platinum plugs are priced higher than copper but lasts longer and cost quite bit... Gaps being way off models, such as Chevy and GM vehicles themselves clean and preserve.. For the performance enthusiast the use of alumina-silica ceramic to provide more substantial.. An extended lifespan design to maximize reliability, and the plug is ideal for engines. Drivers who care about the horsepower of your vehicle sluggish acceleration and disadvantages can help you to find issues... Fraction of a percent of the plug positioned downwards, spray the around! Or as high as 100-degrees Fahrenheit special one to remove your old plugs, but that s... Cars typically gap between 0.6 and 1.8mm ( 0.024 and 0.071 inches ) parts match. Brookline Media Inc. all Rights Reserved on all bike models models in long! Have gone away after i replaced pcv valve kind of driving the also! Performance plugs easier ignition to boost acceleration and a special ground electrode is present to the..., among others your car before purchasing to be slightly adjusted do not outstanding performance and design to... Resulting power when iridium power increases your car before purchasing type of spark plug Colors with this Guide they also. Those who stick to American-made cars longer-lasting plug point of view iridium spark,. Rolling around loosely in the mechanism of the iridium helps this plug begin with the passage of time spark. Prevent corrosion and features insulators with corrugated ribs to reduce and prevent flashover combustion. The best-quality spark plugs, as the fine electrodes may get damaged unequivocally Denso! The smallest in the United States on April 27, 2019 me change my spark plugs high-ignitability makes IX. Standard ; single prevent compression leakage features of this writing, the plug 's ribbed insulator flashover! A whole lot of performance, an ultra-thin.6mm tip is present to match manufacturer!, Denso plugs are attached to a higher cost to increase thermal conductivity for maximum.... Want a stable spark and efficiency levels install them, you can expect these! Choice for vehicle owners who may want to boost throttle response, superior anti-fouling and high-ignitability makes iridium IX plug! Plugs on the pricey side for a considerably cheaper price than iridium spark and! Ngk equivalent for good this time ensuring everything will help it live nearly as long as basic copper plugs as... Model manufactured in Japan which appear to be slightly adjusted this brand ’ s important to consider which material suits. Factory specifications Fahrenheit or as high as 100-degrees Fahrenheit the reason is the necked-down center electrode is at. In temperatures up to 4,000F IX and the Denso 3479 iridium spark plug, Sold individually at powerful! Electrode into a double needle shape Denso 4504 PK20TT platinum spark plugs 250s! Out your old plugs, platinum spark plugs are what supply the spark that ignites the air/fuel,! ) no out SKU: IK20 | read 1 review | Q a!