{"product_id":"honda-ngk-iridium-k20c1-civic-type-r-spark-plug-12290-59b-003","title":"Honda NGK Iridium Spark Plug for FK8 Civic Type R 12290-59B-003","description":"\u003cul\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eSold Individually \u003c\/li\u003e\n\u003cli\u003eCompatible with 17-21 Civic Type R FK8 \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eGenuine Honda NGK Iridium Spark Plug - 2017-2021 Civic Type R (12290-59B-003)\u003c\/h3\u003e\n\n\u003cp\u003e\n  Tuned FK8 stumbling or throwing a misfire when the boost comes up, but running fine when you're just cruising?\n  Start with the plugs. That's the classic symptom, and it's the first thing anybody who works on these cars\n  checks. Cylinder pressure under boost is brutal on a spark plug, and a worn one can't hold a spark against\n  it, so the ignition just blows out right when you're asking for everything. This is the genuine Honda NGK\n  iridium plug, part 12290-59B-003, the exact plug your K20C1 was designed around. One important thing before\n  you order: these are sold individually.\n\u003c\/p\u003e\n\n\u003ch4\u003eYes, You Need Four\u003c\/h4\u003e\n\u003cp\u003e\n  Let's get this out of the way, because it catches people constantly. Your K20C1 is a four-cylinder, and this\n  listing is one plug. So set your quantity to 4 unless you're genuinely replacing a single\n  fouled plug. And honestly? Don't do that either. Plugs wear as a set, and mixing one new plug in with three\n  tired ones just means you're back in there soon. Do all four at once, it's the same amount of work.\n\u003c\/p\u003e\n\n\u003ch4\u003eWhy The Right Plug Matters More On A Turbo Car\u003c\/h4\u003e\n\u003cp\u003e\n  Here's what people miss about plugs on a boosted motor. On a naturally aspirated car, a slightly wrong plug\n  is mostly a nuisance. On the K20C1, it's a real risk. This plug's heat range was chosen by Honda specifically\n  for what happens inside a turbocharged Type R combustion chamber, hot enough to stay clean, cold enough to\n  pull heat out of the chamber before it can light the mixture off early. Get that wrong and you're flirting\n  with pre-ignition, and pre-ignition on a boosted K20 doesn't give you a warning, it gives you a broken\n  ringland. Running the plug Honda spec'd is genuinely the cheap insurance here.\n\u003c\/p\u003e\n\n\u003ch4\u003eWhat Iridium Buys You\u003c\/h4\u003e\n\u003cp\u003e\n  The iridium tip is why these last the way they do. Iridium is brutally hard and handles heat, so the fine\n  center electrode holds its shape for tens of thousands of miles instead of eroding and opening up the gap\n  the way copper does. And that fine electrode takes less voltage to fire, which matters on a turbo car where\n  your coils are already fighting cylinder pressure. Less strain on the ignition system, more consistent spark\n  when it counts.\n\u003c\/p\u003e\n\n\u003ch4\u003eDon't Gap These\u003c\/h4\u003e\n\u003cp\u003e\n  Real advice that saves people money: iridium plugs come pre-gapped from the factory and you should leave\n  them alone. That fine center electrode is precise and it's fragile, and going at it with a traditional\n  gapping tool is how you snap the tip clean off or bend the ground strap into the electrode. Then you've got a\n  ruined plug that looks fine sitting in your hand. Check the gap if it makes you feel better, but don't\n  adjust it unless you know exactly what you're doing and why.\n\u003c\/p\u003e\n\u003cp\u003e\n  Same goes for install: these thread into an aluminum head, so snug them to spec and stop. Gorilla-tighten a\n  plug into aluminum and you'll find out what stripped threads cost.\n\u003c\/p\u003e\n\n\u003ch4\u003eA Note For Tuned Cars\u003c\/h4\u003e\n\u003cp\u003e\n  Straight talk if you're modified. This is the OEM heat range plug, and it's the correct choice for a stock or\n  bolt-on FK8, including most FlashPro or KTuner street tunes. But if you're running serious boost, E85, or a\n  built setup making real power, talk to your tuner about whether you want to step a range colder. Plugs are\n  also a wear item that a tune accelerates, so if your car's tuned, check them more often than the factory\n  interval suggests. They're cheap. Pistons aren't.\n\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGenuine Honda NGK iridium spark plug, part 12290-59B-003\u003c\/li\u003e\n  \u003cli\u003eOEM heat range for the K20C1 turbocharged engine\u003c\/li\u003e\n  \u003cli\u003eIridium center electrode for long life and easy firing\u003c\/li\u003e\n  \u003cli\u003ePre-gapped from the factory\u003c\/li\u003e\n  \u003cli\u003eSold individually (four required per engine)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits These Cars\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2017-2021 Honda Civic Type R (FK8, K20C1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n  Note: Sold individually. Four are required for a complete set. Pre-gapped from the factory; do not re-gap.\n  This is the OEM heat range plug, suitable for stock and bolt-on applications. Heavily modified or\n  high-boost builds should consult a tuner regarding heat range.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2016-2021 Honda Civic EX\/EX-T\/Sport\/Touring\u003cdiv\u003e2017-2021 Honda Civic Type R\u003c\/div\u003e\n\u003cdiv\u003e2021 Honda Civic Type R\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Spark Plug\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Honda","offers":[{"title":"Default Title","offer_id":46028200673314,"sku":"OHA-12290-59B-003","price":32.29,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/OHA-12290-59B-003_8uhw.jpg?v=1784231732","url":"https:\/\/www.hybrid-racing.com\/products\/honda-ngk-iridium-k20c1-civic-type-r-spark-plug-12290-59b-003","provider":"Hybrid Racing","version":"1.0","type":"link"}