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Exhaust Bypass/ Smog Test

Old 02-26-2019, 06:52 PM
Jack Reynolds
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Default Exhaust Bypass/ Smog Test

Im considering one maybe both exhaust pipe systems be converted with a simple bypass at the muffler. Does anyone know if this will create a smog test problem or check engine light for the rest of the system? California 1998 C5.
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Old 02-27-2019, 04:08 PM
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In CA you're pretty much ok as long as you don't do anything at the cat or before.
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Old 03-11-2019, 10:24 AM
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St. Jude Donor '05

x2 catback wont affect your smog test but know theres a new noise law that has one hell of a stiff fine.
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