2006 GMC Sierra 1500 Z71 Crew 5.3L True Duals Flowmaster 40s 2.5" Stock Cats H-Pipe
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I would say the H pipe mellowed it out a tad.
02LM7 11 months ago
do you get any more hp or better mileage after doing this?
ohbabycarpediem 1 year ago
is that a 2 into 1 or separate
chickenmicken1 2 years ago