NGK SILZKBR8D8S Spark Plug (Set of 6) 97506

Replacement for BMW models equipped with N20, N55, N74 and S55 engines.
Suitable “2-Step cooler” upgrade use in N54.
Suitable “1-Step cooler” upgrade use in N63 and S63.
Also Known as NGK 97506
Set of 6
NGK 97506 2-Step Colder Spark Plug
These NGK Laser Iridium replacement plugs are factory standard in BMW N20 & S55 motors. They are two steps colder than stock N54 plugs and suggested for higher boost E85, water/meth injection, and/or upgraded turbocharger applications across all late model turbo BMW models. We suggest setting the gap down to 0.020". These plugs are compatible with all turbo BMW motors including the N20, N54, N55, S55, N63, n63tu, B38, B48, B58, S63, ands63tu.