This Magnaflow Turbo-Back 4 Inch Stainless Steel Exhaust System fits 2001 - 2006 2500HD and 3500 Crew Cab Short Bed Sierra and Silverado Duramax Diesels.

MagnaFlow's Performance Diesel Systems feature giant, fast-flowing, 4" mandrel-bent stainless steel tubing, and a 5" polished stainless steel tip. The MagnaFlow systems incorporate mirror finished MagnaFlow Performance Mufflers with a straight-through design. You can expect significant gains in horsepower, torque, improved fuel economy and a lower EGT (exhaust gas temperature).
• MagnaFlow Performance with a Lifetime Warranty
• OEM-Style Barbed Hangers
• Giant 5" Polished Stainless Steel Tip

Turbo-back: Replaces the flattened OEM downpipe with a stepped mandrel-bent down pipe and OEM style flange that bolts to the back half of the system. Use when a few engine modifications are planned.