2011-2015 GM / Chevy Duramax LML 6.6L Parts

What’s Carried on This Page

• Full Delete Kits — Complete DPF, DEF, and EGR removal kits with Mini Maxx V2, EZ Lynk Auto Agent 3, or EFI Live AutoCal V3 tuner. EZ Lynk and EFI Live kits include a SOTF switch for power level switching. All include an EGR delete kit and a choice of exhaust — DPF delete pipe, 4-inch, or 5-inch exhaust system. Optional add-ons on the product page: 2-inch Up-Pipe High Flo, S&B cold air intake, and downpipe – available with any kit. Pickup trucks fitment only, does not fit Cab & Chassis.
• DPF & CAT Delete Pipe — 4-inch T409 stainless steel delete pipe with V-band flange and clamp. Replaces the factory diesel particulate filter and catalytic converter section. Standalone product — not paired with an exhaust system. Optional T409 stainless steel muffler available.
• LML EGR Delete Kit — Block-off plates, cooler delete hardware, gaskets, and mounting hardware. Covers 2011–2016 6.6L Duramax — works on both V-band and 3-bolt flange vehicles. Sold standalone or included in the full LML delete kit.
• DPF Delete Tuners — H&S Mini Maxx V1/V2 are Plug & Play tuners. Mini Maxx V2 offers power levels at Stock, +50HP, +100HP, and +150HP. EZ Lynk Auto Agent 3 handles ECM calibration through a smartphone app with levels from 0 to +150HP,  and ships with a SOTF switch for physical power level switching. EFI Live AutoCal V3 rounds out the LML DPF delete tuning lineup with custom calibration support, also with a SOTF switch included. All flash through OBD-II and strip DPF, DEF, and EGR logic for improved horsepower and torque. Tuners fit both pickup and Cab & Chassis models — but Mini Maxx V2 doesn’t support LGH trucks.
• Exhaust Systems — 4-inch and 5-inch Downpipe-Back exhaust systems with V-band flange for 2011–early 2015. Both sizes available in T409 stainless steel or aluminized steel. Straight race pipe or with muffler — hanger hardware included. Polished stainless steel Black Bandit exhaust tip sold separately.
• Performance Accessories — S&B cold air intake for improved airflow and efficiency on this engine. Up-Pipe High Flo available for both driver and passenger side. FASS Titanium Signature fuel pump protects the CP4.2 injection system from water contamination. LML downpipe (2011–2015), intake bridge (2011–2015), and 2-inch Up-Pipe High Flo (2001–2016) for exhaust and intake flow upgrades. Harness Plugs Kit (2011–2021) covers exposed connector ends after EGR/DPF removal. Standalone 4-inch and 5-inch universal diesel mufflers for truck owners who want sound control on a straight pipe setup.

Key Features and Benefits of the LML Duramax Delete Kit

• No more forced regen cycles or DEF heater limp mode
• Cleaner intake without EGR cooler soot recirculation
• Lower EGTs under heavy tow with unrestricted exhaust
• Better fuel economy from reduced backpressure

Supported Models

• 2011–2015 Chevy Silverado / GMC Sierra 2500HD & 3500HD 6.6L LML Duramax (Pickup trucks) 
• 2011–2015 GM 4500HD / 5500HD 6.6L LML Duramax (Cab & Chassis — tuner support only)

Got questions about which LML Duramax delete kit or part matches your GM diesel? Call, email, or WhatsApp us — we’ll figure out what works for your vehicle. These performance parts are for off-road and race use only. Check your local regulations before purchasing or installing.