Exhaust pipe size? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-25-2005, 09:52 PM   #1
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Default Exhaust pipe size?

What size pipe would be going into a stock 1990 LE muffler? I am thinking of running a magnaflow with 2.5" in and dual 2" out. I could go out an try to measure, but it isn't easy to get anything within 1/4" with a tape with the muffler still on the car

Now I just need two 2" - 2.5" stainless turndowns and the exhaust work can begin
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Old 05-25-2005, 09:58 PM   #2
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Most likely if it is the original system it is 2.25" o.d.
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