Exhaust Pipe Size
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Joined: Nov 2003
Posts: 388
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From: Victoria, British Columbia
Car: 1989 GTA
Engine: 5.0 TPI
Transmission: T-5 WC
Axle/Gears: Yukon 3.73
Exhaust Pipe Size
Excuse this beginner question.
When people refer to the size (2.25”, 2.5” or 3”) of their exhaust pipes (Y-pipe, intermediate pipe, pipes leaving the muffler) are they referring to the outside diameter of the pipe?
When people refer to the size (2.25”, 2.5” or 3”) of their exhaust pipes (Y-pipe, intermediate pipe, pipes leaving the muffler) are they referring to the outside diameter of the pipe?
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From: Minnesota
Car: 89 IROC-Z
Engine: 370 LSX, LS3 Top End
Transmission: Built T-56
Axle/Gears: 9" Aluminum Center 3.89's
Re: Exhaust Pipe Size
I belive so. i have to get a pipe expanded to 3" ID to slip over my Y-pipe.
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Posts: 6,859
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: Exhaust Pipe Size
Yes, the OD of the pipe. Most programs for figuring exhaust size also figure in a .062" wall.
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