NGK - M50/ M52, S50us / S52us Spark Plugs (Recommended for Modified engines)

Purchase NGK - M50/ M52, S50us / S52us Spark Plugs (Recommended for Modified engines)

Priced individualy (1), Please order as many as needed for your engine.

From our experience, the VAC techs recommend these specific resistor type NGK Spark plugs for M50, M52 and S50us / S52us that are boosted or have bolt on mods over other types of plugs...
The heat range of a plug should be matched to the engines used to ensure proper spark plug thermal performance. If the heat range is not optimal, then fouling of the plug or at the other end of the spectrum- detonation can occur.
The optimal firing-end temp is approximately between 930°F and 1475°F and if the temperature varies too high or low from these temps carbon fouling or plug over heating (and possibly plug failure or pre-ignition) can be the result.

In our testing and years of use, these plugs work excellent on both lightly modified and engines running boost up to 16lbs.
Despite the claims of other "fancy" types of plugs, these have shown the best performance on the Dyno as well as a smoother idle and plenty of lifespan.

Under hard performance driving conditions, checking spark plug gap and/or replacing these plugs on a regular 25-35k mile intervals is recommended for best results.

We always keep these in stock for whenever you need them!