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4.7L-stang · 09-21-2002, 05:58 PM

I had exhust manifolds running into an aftermarket duel exhust kit. Today I added FlowTech headers and an H-pipe into the same aftermarket duel exhust but the car wispers compared to before. Is this normal, is it because the H-pipe, or do my headers suck?

09-21-2002, 05:58 PM	#1
4.7L-stang Registered Member Join Date: Aug 2002 Location: Palm Bay, FL Posts: 29	quite headers I had exhust manifolds running into an aftermarket duel exhust kit. Today I added FlowTech headers and an H-pipe into the same aftermarket duel exhust but the car wispers compared to before. Is this normal, is it because the H-pipe, or do my headers suck? __________________ Der zwei achtzig neun 65' Stang 302 / Holley 4v / Edelbrock ProFlow air cleaner / FlowTech Headers / Aftermarket duel exhust / H-Pipe / Performance Cam