---tab Description--- For 2001-2007 LB7, LLY, and LBZ Duramax off-road builds, this 4- or 5-inch downpipe-back race exhaust uses 409 stainless tubing to replace the factory exhaust with a freer-flowing system. Unlock your LBZ LLY LB7 6.6 Duramax's true potential with this high-performance DPF delete pipe. Our precision-engineered solution eliminates restrictive factory filters, dramatically reducing exhaust gas temperatures (EGTs) while improving turbo spool-up and throttle response. The mandrel-bent construction ensures maximum flow efficiency, helping your diesel breathe easier. Perfect for off-road enthusiasts seeking better power delivery and reduced maintenance hassles. 4-Inch/5-Inch Race Exhaust Specifications Exhaust Material T-409 Stainless Steel, it is magnetic. Thickness 2mm thick for long-lasting durability and heat resistance. Inlet Diameter 4.0"/5.0‘’ mandrel-bent construction Maximum flow efficiency, helping your diesel breathe easier Design Highlights Expect to see a significant increase in fuel mileage. If your DPF is plugged up your probably averaging about 13-14 mpg. More or less depending on the severity of the restriction. After deleting the DPF/CAT expect to get a combined mileage of 18-19 mpg. It removes the need to service the DPF at regular intervals (cleaning, replacement) A DPF delete will remove the possibility of a DPF failure which could cause expensive diesel repairs Due to less exhaust backpressure, the DPF delete increases exhaust flow and therefore increases the performance of your motor! Paired with an ECU remap, the DPF delete is proven to increase power and torque for all vehicles You will get a FREE high-quality exhaust tip for 4''&5'' Dp-back – unlike others who charge extra! Installation Notes Install takes about 1hr with basic hand tools done on the ground of your driveway or garage. Quicker if you have automotive style lift. Cutting may be be required to fit shorter wheelbase bed/cab configurations. Clamps, hangers and hardware are included. You may have to re-use some factory hardware. Tuner Required: Removal of the DPF, CAT, SCR, and/or DOC involves removing and eliminating emission related sensors. A DPF delete capable tuner is required to prevent any check engine light or diagnostic trouble codes from setting. ---tab Fitment--- Vehicle Fitment 2001-2007 Chevy/GMC Duramax Diesel LBZ LLY LB7 Silverado and Sierra pickup trucks 2001 Chevy/GMC Duramax Diesel LB7 Silverado and Sierra pickup trucks 2002 Chevy/GMC Duramax Diesel LB7 Silverado and Sierra pickup trucks 2003 Chevy/GMC Duramax Diesel LB7 Silverado and Sierra pickup trucks 2004 Chevy/GMC Duramax Diesel LB7 Silverado and Sierra pickup trucks 2004.5 Chevy/GMC Duramax Diesel LLY Silverado and Sierra pickup trucks 2005 Chevy/GMC Duramax Diesel LLY Silverado and Sierra pickup trucks 2006 Chevy/GMC Duramax Diesel LLY Silverado and Sierra pickup trucks 2006 Chevy/GMC Duramax Diesel LBZ Silverado and Sierra pickup trucks 2007 Chevy/GMC Duramax Diesel LBZ...