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Seguler EGR & DPF Delete Kit Fit 2011-2016 6.6L Chevy GMC LML Duramax
by SEGULER

Seguler EGR & DPF Delete Kit Fit 2011-2016 6.6L Chevy GMC LML Duramax

SKU SG-ER-0031/ER-0231/ER-0329/DP-0274/DP-0287/DP-0013/DP-0009
$301.40 - $1,357.97
$903.36
$301.40 - $1,357.97
$903.36
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FITMENT

  • 2011–2016 Chevrolet Silverado & GMC Sierra 2500HD / 3500HD 6.6L Duramax LML.

DESCRIPTION

Product Overview

  •  The 2011–2016 6.6L Duramax LML platform offers refined power, but its extensive factory emissions system creates long-term reliability and performance bottlenecks. Restrictive DPF and SCR canisters choke exhaust flow and trap excessive heat.
  • The factory closed CCV system pumps oily crankcase blow-by directly across the turbo compressor blades and into the intercooler; failure-prone EGR coolers cycle dense carbon soot back into the intake tract; and pinched factory up-pipes and downpipes choke turbo drive pressure and spool times.
Key Features
  • Billet EGR Cooler Bypass: Removes the complex dual-cooler EGR assembly, dropping intake air temperatures and clearing up engine bay workspace.
  • Intake & Turbo Protection: Stops oil mist recirculation to keep the intercooler, silicone boots, and turbo impeller clean and free of oil pooling.
  • Flow-Bench Mandrel Downpipes & Up-Pipes: Replaces the crushed factory downpipe profile and crack-prone factory up-pipe bellows to reduce drive pressure and lower towing EGTs.
  • Weather-Sealed Harness Caps: Heavy-duty rubber-sealed plugs protect factory EGT, pressure, and DEF harness connectors under the chassis.
  • Year-Specific Flange Fitment: Precision-engineered 3-bolt and V-band connections ensure exact, leak-free bolt-on installation without custom welding.

FAQ

Q: Why is there an exhaust split between 2011–2015 and 2015.5–2016 models?

A: Mid-year in 2015, GM revised the exhaust connection directly off the turbo downpipe. 2011 to early-2015 trucks utilize a 3-bolt flanged downpipe connection, whereas late 2015.5–2016 trucks utilize a V-band clamp design. Selecting your exact production split ensures the race pipe or downpipe-back kit mates to your truck.

Q: What is the difference between a Race Pipe and a Full Exhaust system?

A: Race Pipe deletes only the restrictive DPF and SCR catalytic canisters, bolting directly into your factory tailpipe for an economical, quieter profile. A Full Exhaust replaces everything from the downpipe back with continuous 4" or 5" mandrel-bent tubing, maximizing exhaust velocity, dropping towing EGTs, and delivering a deep, hollow diesel tone.

Q: What purpose do the Chassis Harness Plugs serve?

A: Unplugging the factory EGT, DPF differential pressure, and DEF tank modules leaves exposed wiring harnesses underneath the truck. The weatherproof dummy plugs seal these factory connectors against mud, water, and road salt, preventing electrical shorts and preserving the truck's CAN-bus communication.

Q: Do these modular components require a custom tuner?

A: Up-pipes, downpipes, CCV reroutes, and mufflers alone do not require custom software. However, installing any EGR Delete Kit or DPF Race Pipe / Full Exhaust strictly requires a custom off-road delete tune to disable factory emissions monitors and prevent Limp Mode.