I recently installed a 2.5 inch full length exhaust with magna flow cats (punched out) and magna flow mufflers. With BBk h pipe. Engine runs super rich now, feels down on power and fouls spark plugs. 1 3/4 full length headers. Brand unknown
Ran amazing with open headers. Question is do I need to re jet carburetor or increase exhaust size? Jetting is cheaper to change.
Engine combo is a 363ci
Afr renegade 195cc
750 double pumper holley
Made 570hp and 520fp on engine dyno
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