Description
These are our go-to recommended spark plugs for forced induction builds under 300hp. They are one step colder than stock, keeping electrode temperatures down so the electrode doesn’t become a hot spot for detonation.
The standard 0.8mm plug gap suits low boost with standard coils, and well over 300hp with coil-on-plug (COP) ignition such as our MX-5 R8 Coil Kit. Above 300hp, though, we’d recommend a colder plug.
