12-01-2012, 05:42 PM
there's no centre box in that section, de-cat pipe is fine but if you run de-cat and de-centre box with just a back box it will be quite loud . (maybe that's what you want?) . .

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