Stock cast iron exhaust manifolds compared to good headers!!
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Joined: Aug 2005
Posts: 847
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From: Brunswick, Ga.
Car: 91 Formula
Engine: 350 L98 SD TPI
Transmission: 700R4
Axle/Gears: 10 bolt PBR 3:23 disc posi
Stock cast iron exhaust manifolds compared to good headers!!
I'm looking for someone that put a F-body on a dyno with stock cast iron exhaust manifolds with a stock exhaust lets say like a 87-89 f-body and then JUST put good headers and exhaust on and then back on the dyno again. Please NO manafactures results. What exactly did you see in gains? Thx. Rob
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Joined: Nov 2005
Posts: 179
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From: East Bay Area
Car: 1984 Z28
Engine: L31
Transmission: WC T5
Axle/Gears: 10 bolt 3.73
Just look about 4 threads down. It's called "my dyno results are in". Cant miss it. Summary: L69 headers, cat, cat back +~20hp at wheels
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