4" Exhaust DPF Delete | GM Duramax Diesel LML 15.5-16
Availability - If you see “#” pieces in stock above the add to cart button it will ship within 1 business day. If there’s no quantity shown; the part is either built to order, ships directly from the manufacture or is temporarily out of stock. In that case, it could take up to 20 business days to ship.
4" Downpipe-Back DPF & CAT delete exhaust system.
Vehicle fitment - 2015.5 & 2016 Chevy / GMC Duramax Diesel LML. Silverado and Sierra pickup trucks. Crew cab short bed & crew cab long bed. This will not fit the 3500/4500/5500 Cab & Chassis commercial style truck.
2015 or 2015.5? - 2015 is a split year. The 2011-2015 downpipe is secured to the turbo-direct pipe using a V-band style clamp. The 2015.5-2016 uses a 3 bolt flange style connection. Be sure to visually verify the clamp style your truck is equipped with.
Exhaust Material - Available in aluminized steel or T-409 stainless steel. Aluminized steel is our most popular but will eventually accumulate surface rust. T-409 stainless steel. Unlike T-304 Stainless its still magnetic. So if your testing to see if you actually got stainless; beware that a magnet will still stick to it. We suggest the stainless upgrade if you regularly operate your truck on salted winter roads. Use drop down menu to make desired selection.
Installation - Install takes approx. 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.
Fuel Mileage - 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. Larger tires and poor driving habits will skew mileage downward.
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. If you don’t already have a DPF delete capable tuner we recommend the EZ Lynk.
Orders cannot be canceled after they’ve been placed. We use multiple third party fulfillment companies, distribution centers & manufactures. The logistics of coordinating a cancellation are not feasible.
Returns are accepted for most items. Returns must be made within 30 days of receiving item. Item/s must be brand new & resell-able condition. Customer is responsible for return shipping costs. Original shipping charges are non refundable.
Electronics that require custom tuning or are VIN specific cannot be returned and are non refundable. This includes EZ Lynk, SCT, Bully Dog & EFI Live.
Contact us for return instructions. Do NOT send to return address on original package.
Availability - If you see “#” pieces in stock above the add to cart button it will ship within 1 business day. If there’s no quantity shown; the part is either built to order, ships directly from the manufacture or is temporarily out of stock. In that case, could take up to 20 business days to ship.