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I have an appointment Friday to have a 3 1/2 in. powerflow muffler put on my 2004 Duramax with 600 miles on it. We will be taking the 3 1'2 in. out pipe to two 3 in. pipes that come out the back. Is this a good thing to do? Is it likely to kick on the check engine light? Are there any kits out there that are bolt on with duals that come out the back?
Thanks for any advice.
Bluejay
Thanks for any advice.
Bluejay