Thats all we use mostly on our race cars(flowmaster). I dont think on a 5300 lb truck you'd see any gains going to a better flowing muffler, IMHO.
Maybe to big in for Hemi, just how Flowmaster has it labeled, but better suited for diesel.
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2011 Ram Express, Extang trifecta, 2" GF Leveling kit, Code Alarm remote start, 22" KMC Slides on Nitto 420s, Retroshop custom headlights and tinted tails, Bedrug
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