Quote Originally Posted by pwdunmore View Post
Plugs only last ~12k in these cars when running more boost, I got to replace mine this year.

info link:
https://cobbtuning.zendesk.com/hc/en...ug-Information
not to take anything away from Cobb but I ran OEM, stock, from the factory NGK plugs in my engine for 90,000+ kms. Half of that was Stage 2 @ 20psi (no meth)

When they were pulled from the motor, they were still good and the gap across all of them were still within spec.

NGK > Denso