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Flowmaster American thunder exhaust 5.3


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Anyone have any good videos of their flowmaster American thunder series exhaust for a 2015 GMC Sierra 5.3l ? Also looking to do a 2.5 Rc and .5 in the rear on my truck. Anyone have updated pictures with a lift with these specs on stock 20inch rims ?

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I just had a thunderbolt(flowmaster knock off) 40 series muffler installed yesterday plus had the resonator removed, has a little drone but I'll survive as it is nothing compared to what I had on other vehicles.

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