---tab Description--- Note: Spelab 6.6L Duramax L5P DP-Back must be used together with our downpipe. The factory downpipe has an integrated SCR assembly and cannot connect directly. Ours must be installed first to allow proper attachment of the subsequent exhaust section. Unlock your 2017-2025 L5P 6.6L 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. Specification 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 Benefits 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 DPF Delete Race Pipe Instruction for L5P 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--- 2017-2025 L5P 6.6L Duramax Diesel GMC Sierra 2500 HD 2017-2025 L5P 6.6L Duramax Diesel GMC Sierra 3500 HD 2017-2025 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 HD 2017-2025 L5P 6.6L Duramax Diesel Chevrolet Silverado 3500 HD Crew cab short bed & crew cab long bed. This will not fit the 3500/4500/5500 Cab & Chassis commercial style truck. ---tab FAQ--- Q1. What’s the difference between 4" and 5" exhaust systems? 4" – Better for mild/moderate tunes, retains some backpressure for low-end torque. 5" – Best for high-horsepower builds, maximizes flow for reduced EGTs and top-end power. Q2. Will a magnet stick to this...