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muffler size

626 Views 4 Replies 3 Participants Last post by  CHVY4LF
i have a 2002 silverado c1500 with the 4.8 and im looking to get a flowmaster super 40 muffler but i dont know what size exhaust i have so if any1 can help it would be great
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si/so so should i get 3in. in 3in out or 2.5 in and 2.5 out
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