muffler L36 Vs L67 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-08-2007, 09:50 PM   #1
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Default muffler L36 Vs L67

like to know if the muffler an exhaust system is the same for a L36 and L67 for the same years bonneville regal or any other that offer the 2 engine in the same car same years
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Old 05-08-2007, 10:10 PM   #2
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Nope.

Well, yes.




Ok, it depends.


Early SSE'* it'* the same, or SLE'* in the newer cars.

SE'* are different. So the answer is SOME L36'* got the same MUFFLER setup, but had .25" smaller exhaust piping.
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Old 05-08-2007, 11:44 PM   #3
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thanks will tomorow im replacing the stock 2 1/4 muffler for a 2 1/2 pipe and dyno max turbo more for sound than performance but it may help a bit
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Old 05-09-2007, 12:04 AM   #4
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From our experience, you won't be outflowing the muffler until you're in the 12-13 second range on the 1/4. Sound will change, but not performance. The only 'bulge' in the stock exhaust that MAY effect felt performance is the cat.
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