L36 Downpipe - 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 05-17-2004, 12:12 AM   #1
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Default L36 Downpipe

I was looking to get a 3" downpipe for my L36. Where can I get one? Would a downpipe made for a grand prix fit my bonneville?
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Old 05-17-2004, 12:17 AM   #2
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They have different exhaust manifolds. Any exhaust shop worth it'* pipe should be able to fab something up for you. However, you don't have the U bend, so it won't gain you as much as say, a High flow cat, or muffler.
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Old 05-19-2004, 12:37 AM   #3
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if i were to purchase a set of grand prix exhaust manifolds, would it be possible to use one of their downpipes? Also, would they even bolt up to the bonneville heads?

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Old 05-19-2004, 02:11 AM   #4
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Same heads, but i don't think you'd want to, no gains, the bonneville exhaust and intake setups are less restrictive, which is why they're rated 5HP more from the factory.

Best bet would be to get headers.
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Old 05-19-2004, 07:46 AM   #5
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So you're saying there is no baffling in the downpipe?
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