C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1991 Muffler Fit

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Old Jun 8, 2025 | 05:09 PM
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Default 1991 Muffler Fit

Is there really any difference between the mufflers on 1990 and 1991 model other than the shape of the exhaust tips? It seems some companies sell mufflers/cat back systems that will fit 86-90 and others sell mufflers/systems that fit 86-91. What is the difference that keeps mufflers from fitting 1991 models?
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Old Jun 19, 2025 | 04:08 PM
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Originally Posted by Thowie1974
Is there really any difference between the mufflers on 1990 and 1991 model other than the shape of the exhaust tips? It seems some companies sell mufflers/cat back systems that will fit 86-90 and others sell mufflers/systems that fit 86-91. What is the difference that keeps mufflers from fitting 1991 models?
Good question. I hope somebody has an answer for you!
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Old Jul 16, 2025 | 09:28 AM
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Anybody got an answer for us on specific exhaust differences between 90 & 91?
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