MAC ProChamber in Illinois

GTStang Guy

New Member
Aug 1, 2004
35
0
0
Chicago
I bought a MAC ProChamber to replace the stock h-pipe. No places will install it because it removes the cats. Is it really worth it to buy hi-flow cats for like $100 a piece and have someone weld them on to the Prochamber pipes? Or should I try and return it and use my money for a Diablo chip or H-pipe with hi-flow cats already on? Stupid emissions :bs: