Thread: Cobrapack Mufflers?
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Old 02-05-2011, 07:25 AM
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Cobra Make, Engine: SPF #1235
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You will see an improvement with the 3" core for a 428. I had the 20" body and went with the 22". Not a whole lot louder until you step on it. If you do a search you will find several threads on this subject.
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