5" Down Pipe-Back Full Exhaust Delete | GM/Chevy 6.6 Duramax 2011-2016
The 5" Downpipe-Back Delete Pipe for 2011–2016 LML Duramax removes the Diesel Particulate Filter (DPF) and catalytic converter (CAT) from your Silverado 2500HD/3500HD or Sierra 2500HD/3500HD. It's our best-selling Duramax 5" full exhaust, built from high-quality T-409 stainless steel with OEM-style hangers and clamps for an easy, factory-style install. Free shipping is included.
That 5" diameter moves more exhaust volume than a 4" pipe — less restriction at high-load RPM, faster turbo spool under heavy towing, and a more aggressive tone. The system runs from the downpipe back and replaces the OEM DPF and CAT sections with a wider, free-flowing path. With regen cycles and DPF backpressure gone, most owners feel the throttle response improve right away.
In the box you get the 5" T-409 stainless full exhaust, OEM-style hangers and clamps, and a step-by-step installation guide. It fits all cab and box lengths on the pickup models but does not fit Cab & Chassis trucks. One important note for 2015: early 2015 trucks use a V-Band clamp at the downpipe, while 2015.5 trucks use a 3-bolt flange — check your connection before ordering.
You'll need a compatible delete tune so the ECM doesn't throw DPF codes; call (888) 830-2588 to pair the right LML tuner. Final sale on exhaust — damaged or incorrect parts get replaced at no cost.
For off-road/competition use only.
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Shipping & Returns
5" Down Pipe-Back Full Exhaust Delete | GM/Chevy 6.6 Duramax 2011-2016
5" Down Pipe-Back Full Exhaust Delete | GM/Chevy 6.6 Duramax 2011-2016
The 5" Downpipe-Back Delete Pipe for 2011–2016 LML Duramax removes the Diesel Particulate Filter (DPF) and catalytic converter (CAT) from your Silverado 2500HD/3500HD or Sierra 2500HD/3500HD. It's our best-selling Duramax 5" full exhaust, built from high-quality T-409 stainless steel with OEM-style hangers and clamps for an easy, factory-style install. Free shipping is included.
That 5" diameter moves more exhaust volume than a 4" pipe — less restriction at high-load RPM, faster turbo spool under heavy towing, and a more aggressive tone. The system runs from the downpipe back and replaces the OEM DPF and CAT sections with a wider, free-flowing path. With regen cycles and DPF backpressure gone, most owners feel the throttle response improve right away.
In the box you get the 5" T-409 stainless full exhaust, OEM-style hangers and clamps, and a step-by-step installation guide. It fits all cab and box lengths on the pickup models but does not fit Cab & Chassis trucks. One important note for 2015: early 2015 trucks use a V-Band clamp at the downpipe, while 2015.5 trucks use a 3-bolt flange — check your connection before ordering.
You'll need a compatible delete tune so the ECM doesn't throw DPF codes; call (888) 830-2588 to pair the right LML tuner. Final sale on exhaust — damaged or incorrect parts get replaced at no cost.
For off-road/competition use only.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The 5" Downpipe-Back Delete Pipe for 2011–2016 LML Duramax removes the Diesel Particulate Filter (DPF) and catalytic converter (CAT) from your Silverado 2500HD/3500HD or Sierra 2500HD/3500HD. It's our best-selling Duramax 5" full exhaust, built from high-quality T-409 stainless steel with OEM-style hangers and clamps for an easy, factory-style install. Free shipping is included.
That 5" diameter moves more exhaust volume than a 4" pipe — less restriction at high-load RPM, faster turbo spool under heavy towing, and a more aggressive tone. The system runs from the downpipe back and replaces the OEM DPF and CAT sections with a wider, free-flowing path. With regen cycles and DPF backpressure gone, most owners feel the throttle response improve right away.
In the box you get the 5" T-409 stainless full exhaust, OEM-style hangers and clamps, and a step-by-step installation guide. It fits all cab and box lengths on the pickup models but does not fit Cab & Chassis trucks. One important note for 2015: early 2015 trucks use a V-Band clamp at the downpipe, while 2015.5 trucks use a 3-bolt flange — check your connection before ordering.
You'll need a compatible delete tune so the ECM doesn't throw DPF codes; call (888) 830-2588 to pair the right LML tuner. Final sale on exhaust — damaged or incorrect parts get replaced at no cost.
For off-road/competition use only.
