Oval exhaust systems
04-22-2007, 10:06 PM
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Car: 1982 Trans Am & 1982 Corvette
Engine: L-98 with LO-3 induction. 350 CFI
Transmission: 5 speed and vette has 700r4
Axle/Gears: 373's in T/A .. vette unknown
Oval exhaust systems
anyone ever made or bought a 4 to 5 inch oval exhaust system. for an F-body ... I've been thinking of at least a nice custom made 4 inch oval system for my car.
04-22-2007, 11:42 PM
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Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: Oval exhaust systems
What in the world are running, that calls for a 5" pipe? A diesel?
4" would be the most you'd ever need, and only approaching 600hp. Too big of pies, and you'll lose exhaust velocity, and cost you horsepower.
4" would be the most you'd ever need, and only approaching 600hp. Too big of pies, and you'll lose exhaust velocity, and cost you horsepower.
04-23-2007, 12:01 AM
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Car: 1984 Trans Am
Engine: broken 385sbc
Transmission: G-Force rebuilt T-5
Axle/Gears: Currie 9" Ford 4.30:1
Re: Oval exhaust systems
IIRC, oval exhaust is measured at the wide part of the oval.. so 4" oval might be 3" round.. or 3.5"
heres a chart from Dr.Gas
heres a chart from Dr.Gas
04-24-2007, 05:26 AM
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Re: Oval exhaust systems
GTATransam...have you checked out spintech mufflers website? They offer oval bends that actually look like they'd go over the rear end easier / more clearance than 3" rounds. Just looking at them though, I haven't bought them......."yet". 
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