I've been running my Kenne Bell front mount for 17 years unpainted heck i even polished it once. Have never had a problem and can run 21 lbs boost on 93 octane.
I had the car out last night for over an hour testing the new plug gap on the ngk tr6ix iridium plugs now gapped at .038 from .040, factory pregap was set at .045 Engine felt more responsive at .038 though.