Shop MagnaFlow Performance Exhaust Systems for the 2007 GMC Sierra 3500 HD, including DPF back exhaust systems for select engines, trims, and configurations. Engineered to produce MagnaFlow's deep signature exhaust sound, these systems feature premium materials and easy direct-fit installation. 2007 GMC Sierra 3500 HD exhaust options include 5-inch main piping diameters; black coated and polished exhaust tip finishes; single passenger side rear exit styles. Use Shop by Vehicle to find the system for your Sierra 3500 HD.