cutout before or after cat?
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From: Woodland, CA
Car: '02 Z06
Engine: L33 5.7
Transmission: T56
Axle/Gears: Stock IRS
cutout before or after cat?
is thier a major power/sound difference if i moved my cutout from after to before the cat?
Major is too subjective of a term. The trend is to follow the before-cat placement. 
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From: you aint stealing my car..
Car: 1984 Z28
Engine: 5.7
Transmission: Auto w/ shift kit
before cat = loud as hell no restriction
after cat = lil lower sounding acually probally street drivable all day depending on engine work i would guess and alittle restriction
after cat = lil lower sounding acually probally street drivable all day depending on engine work i would guess and alittle restriction
Joined: Feb 2001
Posts: 13,753
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
You want to put it before the cat. That is the whole purpose. You are trying to bypass any restriction that may occur in a typical exhaust system (cats, muffler etc).
Joined: Feb 2001
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From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
You want to put it before the cat. That is the whole purpose. You are trying to bypass any restriction that may occur in a typical exhaust system (cats, muffler etc).
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