PRODUCT DETAILS
NGK K-Series Spark Plugs - RSX, TSX, Civic Si, Accord & More
Spark plugs are cheap, they wear out, and a tired set quietly costs you power, smoothness, and fuel economy long before they actually fail. These are OEM-quality NGK plugs for the K-series, the right plug whether you're freshening up a daily-driven RSX or Civic Si or buttoning up an engine build. Sold individually, so you order exactly the set you need, and they pair with the K20A2 coil packs we also stock.
Why Fresh Plugs Are Worth It
Worth understanding, because plugs degrade gradually and you adapt to it without noticing.
A spark plug's job is to light the mixture cleanly every cycle. As the electrode wears and the gap widens over tens of thousands of miles, the spark gets weaker and less consistent. You don't get a dramatic failure, you get a slow decline: slightly rougher idle, a little less crisp throttle response, marginally worse fuel economy, and eventually a misfire when a plug finally gives up.
Because it happens slowly, most people don't realize how much a car has dulled until they fit fresh plugs and it wakes back up. On a VTEC K-series that lives in its upper rev range, clean, consistent ignition matters even more, which is why fresh plugs are one of the cheapest ways to keep the engine feeling right.
NGK Is The Standard For These Engines
NGK is what Honda specifies, and for good reason.
These are OEM-quality NGK plugs, the same brand and standard the K-series came with from the factory. Spark plugs are a part where the wrong choice, incorrect heat range, poor quality, causes real problems, from fouling to detonation, so matching the OEM spec is the safe, correct move. NGK plugs fit right, spark consistently, and last, which is exactly what you want from a maintenance item you'd rather not think about.
Buy The Set You Need
These are sold individually, and a K-series four-cylinder uses four plugs.
Selling them individually means you order exactly four for a standard replacement, or a spare to have on hand, rather than a fixed pack. For a normal plug change or an engine build, order four and do the whole engine at once, always replace plugs as a complete set so all four cylinders fire consistently, never mix old and new.
Do Them With Your Coil Packs
The natural pairing, and there's a real reason for it.
Plugs and coils are the two halves of your ignition, and they wear on similar timelines. If you're chasing a misfire or freshening up ignition, doing both together makes sense, a weak coil can even foul or overwork a plug, and vice versa.
These pair with the K20A2 coil packs we stock, so you can refresh the whole ignition system in one order. If your car has real miles and you're already in there, doing plugs and coils together is how you get ignition back to fully sorted rather than fixing one and revisiting the other later.
Gap And Install Notes
A couple of practical points for the install.
Check the gap against your engine's spec before installing, plugs can shift slightly in handling and shipping, and the correct gap is what gives you a clean, consistent spark. And torque them properly: too loose and they don't seal or transfer heat right, too tight and you risk damaging the threads in an aluminum head, which is an expensive mistake on a K-series.
If you're not sure of your gap or torque spec, your service manual has it for your specific engine.
Fitment
2002-2006 Acura RSX
2004-2008 Acura TSX
2002-2011 Honda Civic Si
2003-2007 Honda Accord
2002-2006 Honda CR-V
2003-2011 Honda Element
Sold individually. K-series four-cylinders use four plugs.
Who Should Grab These
This is for anyone maintaining a K-series who wants ignition back to fresh, and for anyone doing an engine build who needs the right plugs going in. OEM-quality NGK, the standard for these engines, sold individually so you buy exactly what you need. Order four, check your gap, torque them right, and pair them with fresh coils if your ignition's due. Cheap insurance on how the engine runs.
Fits: 2002-2006 Acura RSX, 2004-2008 TSX, 2002-2011 Civic Si, 2003-2007 Accord, 2002-2006 CR-V, 2003-2011 Element. Brand: OEM-quality NGK. Sold: individually (K-series uses four). Pairs with: K20A2 coil packs. Note: check gap and torque to spec before installing.
2002-2006 Acura RSX