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Discussion Starter · #1 ·
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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Discussion Starter · #3 ·
si/so so should i get 3in. in 3in out or 2.5 in and 2.5 out
 
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