2007-2010 Duramax LMM Stainless Steel 4" DPF Back Exhaust (S6026SLM) Piston By installing the Mega-Flo TVM

By installing the Mega-Flo TVM Grid Heater

These are the doors in the center of the box that are above and below the heater core and control your temperature

and then out through the fan grille

306" lift fuel pump lobe

2007-2010 Duramax LMM Stainless Steel 4" DPF Back Exhaust (S6026SLM) Piston By installing the Mega-Flo TVMMBRP's 4" DPF (Diesel Particulate Filter) Back SLM Series Exhaust System for your 2007 2010 GMC Chevy 6. 6L Duramax LMM diesel pickup is made from 16 gauge T409 Stainless Steel, which lasts longer than aluminized steel exhaust kits. This free flow exhaust kit does not come with a muffler or exhaust tip.