Stock mufflers
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Joined: Feb 2007
Posts: 224
Likes: 0
From: Middlesex,NJ
Car: 1986 Firebird LG4
Engine: 305 5.0 LG4
Transmission: TH-700R4
Axle/Gears: 2.73
thats cuz they pretty much are....basicly everything about your stock exhaust system is restrictive...thats why i replaced mine ( well most of it anyway )
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Genopsyde
Engine/Drivetrain/Suspension Parts for Sale
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Oct 7, 2015 08:35 PM




