Shop used GMC 6.6L DURAMAX Exhaust & Emissions on MyLittleSalesman.com . Compare active listings with prices from $50 to $4,500. Sellers include DTI Truck Parts, Dutcher's, Rydemore Heavy Duty Truck Parts, and more. Filter by condition, price, or year to find the GMC 6.6L DURAMAX that fits your job.