05-04-2016, 09:09 AM
Yeah the coating is to stop corrosion, you should always give them a spray with brake cleaner and wipe them down before fitting

Phase 1 D-Turdo, K14@24 psi, De-cat, meaty backbox, Bosch pump, grinded LDA pin, duel air fed K&N =133.7bhp & 188ft/lbs