Flowmaster 818112: Outlaw Cat-Back Exhaust System fits Select Chevy Silverado, GMC Sierra 2500HD/3500HD Pickup Truck 6.6L (Crew Cab)
GM
Outlaw Cat-Back Exhaust System Fits Select GM Silverado, Sierra 2500HD/3500HD Pickup 6.6L (Gas) Crew Cab w/6.5 ft. Bed & 159 in. W/B Only 3.500 in. Inlet Dual 3 in. Outlets 4 in. Polished Tips Dual Out Rear/Dual Out Side Exit