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


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-30-2004, 04:34 AM   #1
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Default Exhaust Diameters?

Ok I am trying to determine what my exhaust pipe sizes are and if they are 2.25" or 2.5"



1994 L27



I am pretty sure that the Cat diameter is 2.5"


Is the muffler 2.5" as well on both sides??
I get these part numbers for replacment mufflers

Maremont 103184
Walker 21180




If I want a chrome tailpipe do I get a 2.25" or 2.5"???
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Old 01-05-2005, 07:46 PM   #2
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2.5" is what my dad'* 93 is.
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Old 01-18-2005, 12:30 AM   #3
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If the car has a 2.5" midpipe (92 and 93 only) it will have a 2.25" tail pipe. The 94 will have a 2.25" midpipe, behind the resonator, and should have a 2" tail pipe. Therefore you will need a 2" tip.
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Old 01-18-2005, 01:33 AM   #4
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Yeah, go outside as measure it. That'* the best way.
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