5" Turbo Downpipe Back Exhaust System for 01-07 Chevy/GMC 6.6L Duramax Turbo Pickup Truck Fit: 2001-2007 Chevy/GMC Duramax 6.6L Turbo Diesel Pickup Truck Will Fit Extended & Crew Cab, Short or Long Bed - Exclude Cab & Chassis Models 5" Turbo Downpipe Back Performance Exhaust System (Front Pipe Included) Improve Sound, Horsepower & Torque. Mandrel-Bent For Maximum Performance Mandrel-Bent For Maximum Performance. Simple Bolt On Hangers