Hey guys, My 03 Mustang GT has a Mac cold air Intake, Long tube catted X-pipe, and flowmaster 40series muffler inserts.
I just ordered BBk long tube headers, off-road H-pipe, and the full cat back flowmaster 40series exhaust.
The Mustang currently has 242RWHP, how much would it increase to with this upgrade?? any help is appreciated! thanks in advance.
Chris, <--wish they had a ZEX bottle!! lol. I also got a 75shot!