Delete Depot
2020-2025 Downpipe Back 6.6L GM Duramax 2500 3500 L5P Race Exhaust 5” or 4” SS409 with Tip
2020-2025 Downpipe Back 6.6L GM Duramax 2500 3500 L5P Race Exhaust 5” or 4” SS409 with Tip
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4″ or 5″ Downpipe Back DPF cat delete exhaust system. Exhaust shown is a 2017-2019 GM Duramax L5P 6.6L
Inside the box
ss409 Downpipe back race exhaust for 2020-2025 6.6L Duramax L5P 2500 & 3500
1.25in wide band clamps
Mandrel bent tubing
Pre bent exhaust hangars
*If a muffler is added you will get both pipes for a straight pipe or a muffler.
1in larger diameter ss304 tip
You will reuse the factory 4 bolt hardware
Vehicle fitment – 2020, 2021, 2022, 2023, 2024 & 2025 GM Duramax 2500/3500 6.6L Diesel. Regular cab short and long bed, Crew cab short and long bed. This will not fit the Cab & Chassis commercial style truck. 4 bolt only.
Exhaust Material – Available in T-409 stainless steel. T-409 stainless steel. Unlike T-304 Stainless its still magnetic. So if you’re testing to see if you actually got stainless; beware that a magnet will still stick to it. We suggest the stainless if you regularly operate your truck on salted winter roads.
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. 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.
Race Tuning – Special tuning is required so you don’t get a check engine light. We recommend EZ Lynk as an easy solution. Check out our tuning solutions under the tuning section.
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