3" exhaust too big?
04-25-2008, 05:00 PM
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Car: 1987 Firebird Formula
Engine: 355
Transmission: 700R4
Axle/Gears: Posi, 3.23
3" exhaust too big?
I'm buying a 350 block from a guy at work and having it rebuilt. I just bought a set of headers off of a member here with 3" collectors, and I was thinking about doing 3" exhaust from the headers back. Is that too big or should I just go with 2.5"? My problem is, since these headers have 3" collectors, how would I go about doing that with 2.5" y-pipes?
04-25-2008, 06:45 PM
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Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
Re: 3" exhaust too big?
are you doing true duals or single?
04-25-2008, 07:04 PM
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Car: Chevrolet Camaro IROC-Z,96 Vette
Engine: 350 5.7 Liter
Transmission: 700r
Re: 3" exhaust too big?
i got stock manifold going to a 3 1/2 inch exhaust pipe with cat and muffler with 2 1/2 exhaust tips.
04-25-2008, 07:24 PM
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Car: 1987 Firebird Formula
Engine: 355
Transmission: 700R4
Axle/Gears: Posi, 3.23
Re: 3" exhaust too big?
And I'm probably only going to do single but have dual tips in the back.
04-25-2008, 07:26 PM
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Car: 82' z28/03' eddie bauer explorer
Engine: 355-395hp/4.6v8
Transmission: Built 700R4/5speed auto 4x4
Axle/Gears: 3.42LSD/3.73
Re: 3" exhaust too big?
just wondering why would you put a nice exhust system on your car and bolt them up to those power robbing stock manifolds you can get a decent set of headman headers for around 80
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04-25-2008, 08:34 PM
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Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
Re: 3" exhaust too big?
if you are going single defently go with 3
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