Skip to main content .ca Hello, Sign in. They represent the ultimate evolution of spark plug technology and performance. One Step Colder Plugs 2004+ STI / 2006-2014 WRX. Pwnall Performance Fiesta ST Rear Motor Mount (RMM) Sale price $109 99 $109.99 Regular price $129 99 $129.99. MSRP USD 19.45 Our Price USD 8.38 Our Price CAD 11.56. Available in 14mm and 12mm plug thread sizes. On two wheels Motorcycle racing //TekniWiki; Spark Plugs . Home > Ignition Systems > Spark Plugs > NGK Iridium IX Spark Plug (LFR7AIX) - 2309. $38.82. Read honest and unbiased product reviews from our users. Part #: Manufacturer Warranty : 60 Days . Remco said: You already had this idea: I'd swap plugs between holes and see whether it travels. This NGK N54 plug is one step colder on the heat range scale. NGK RACING / NGK IRIDIUM RACING Spark Plugs. NGK Spark Plugs for formula one racing quality. NGK 2309 SPARK PLUG $9.11. 4.8 out of 5 Stars. These are available in stock heat or one step colder for cars running approximately 100 horsepower more than stock. Commonly used in the Mazdaspeed 3, Mazdaspeed 6, Mazda CX-7 and other engines. Part Number: 1084018. These NGK Iridium IX spark plugs feature an ultra-fine center electrode that's designed just thick enough to ensure the maximum durability and life of the spark plugs, and just thin enough to create an accurate and consistent spark. These are the one step colder plugs that are recommended by many tuners for these cars. But I know many people with tuned cars who routinely change their iridium plugs every 10-15000 miles. NGK (6619) LFR6AIX-11 Iridium IX Spark Plug, Pack of 1 4.6 out of 5 stars 204. If want the exact ones I use it would be these ones:NGK Iridium Spark Plugs One Step Colder 2309 Witch are stated to work with my car. NGK 2309 Spark Plug, Pack of 1 in Spark Plugs. These are one step colder than stock with a heat range of 7. The Iridium IX spark plug also features special plating to resist corrosion and seizing. The stock plugs produce too much heat with higher boost levels and misfires and knocking (pre-detonation) occur. NGK Iridium Spark Plugs One Step Colder 2309. Numerous questions have surfaced over the years, leaving many people confused. IRIWAY 8 . NGK # 2309 Iridium Spark Plugs LFR7AIX ---- 6 PCS NEW 4.8 out of 5 stars 9. One Step Colder plugs are reccomended for cars with heavy modifications. 1-Step Colder Spark Plugs for BMW N54 Engines. Qty: Details Fitment (1) NGK V-Power Spark Plug LFR7AIX2309 (1 Heat Range Cooler than Stock) NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. Iridium IX Spark Plugs LFR7AIX, Stock 2309. ALSO FITS OTHER MAKES AND MODELS CHECK YOUR APPLICATION BEFORE BIDDING. 04-UP STI . Pre-gapped and ready to drop in! Look no further, NGK has got you covered with these Laser Iridium Stock Heat Range Spark Plug Set! Great for stage 2+ 7 months ago. Spark plugs are one of the most misunderstood components of an engine. Spark Plug NGK LFR7AIX#2309 (1GR 4.0 Colder) (Each) Our Price: $ 10.95. Hello everyone, I was wanting to buy some new spark plugs for my 02 wrx, but did not know which ones to get. Iridium IX Spark Plugs LFR7AIX, Stock 2309 NGK. NGK.com specializes in hard to find NGK products. $12.09 $8.49 (You save $3.60) SKU: LFR7AIX; Availability: Normally ships in 1-2 business days; Current Stock: Quantity: Decrease Quantity: - Increase Quantity: + Share This. Add to cart. MODEL # NGKLFR7AIX-GRP. With this tool, you will be able to gap plugs faster and maintain accuracy. I like the NGK iridium plugs. The idle seems a bit smoother than the 20K mile factory plugs did, but I did not check the mileage since install, and since I got the factory heat range version of these (they DO offer a one step colder version as well), the WOT throttle response is very close to the factory igniters, and maybe a little bit smoother. NGK is all I use in my modified '07 WRX, currently running "one step colder" plugs. 5 people found this helpful. View Product. $44.80. Download Spec Sheet Where to Buy Part Finder. Send to a friend *: *: * Print ; Price Match . Maybe cracked the porcelain on #4 got cracked using various extensions and swivel sockets. NGK Iridium IX Spark Plugs are designed specifically for the performance enthusiast. These NGK plugs will get your Turbo Subaru running smoother and free up some power through increased efficiency and increased heat resistance. Click to expand... Ok. A good rule of thumb is, one heat range colder for every 75–100hp added. Pre gapped NGK 6510 Iridium Spark Plugs (1 Step Colder) Ford Ecoboost. Starting with part # IK20 (heat range 20), a colder plug would be # IK22, a hotter plug would be # IK16. Free delivery on eligible orders. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber. I tried to tell her that I thought she was wrong and that with NGK the higher the number the colder the plug. The Iridium IX spark plug also features special plating to resist corrosion and seizing. Find NGK Spark Plugs LFR7AIX NGK Iridium IX Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! I don’t know. Iridium also has a very high melting point which keeps it functional in a high heat, high performance engine. $36.93. Check out my other items! We are not NGK Spark Plugs USA. She looked them up and told me they only sell the "1 colder" version of this plug, PLFR5A-11. $38.82. The colder heat range will lower combustion chamber temperatures and resist knocking and eliminate misfires. Tweet Share Google+ Pinterest . NGK LFR7AIX spark plugs for the 2006-2014 WRX and 2004+ Subaru STi models. Buy 4 New NGK Iridium IX Spark Plug LFR7AIX # 2309 by NGK at Amazon UK. Read more. For example, IK20 has a heat range of 20. Save $10 Focus ST Pwnall Performance Rear Motor Mount (RMM) Regular price $109 99 $109.99. Helpful. Thank you for that I will recheck it and see. As such, the effect of LPG on the operating temperature of one vehicle may not be the same for another vehicle. Iridium Spark Plugs. The iridium center electrode is both stronger and harder than platinum. Denso plugs get colder the higher the number, hotter the lower the number. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Reviews; Questions & Answers; 21 Reviews. NGK Iridium IX Spark Plug (LFR7AIX) - 2309. 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