2011β2015 LML 6.6L Duramax Parts Collection
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Upgrade parts for 2011-2015 GM HD trucks with 6.6 LML Duramax engines
This 2011-2015 LML 6.6L Duramax collection fits Chevy Silverado and GMC Sierra 2500HD/3500HD pickups with factory DOC, DPF, and SCR/DEF exhaust hardware. Coverage includes 2011, 2012, 2013, 2014, and early 2015 models with the V-band clamp downpipe connection. Standalone tuners also fit 4500HD/5500HD Cab & Chassis.
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Feature |
2011β2015 |
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Engine Version |
6.6L Duramax LML |
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Supported Models |
Silverado/Sierra 2500HD/3500HD Pickup |
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Tuner Options |
EZ Lynk AA3, Mini Maxx V2, EFI Live AutoCal V3 |
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Unlock / ECM |
No ECM unlock required.Β Mini Maxx V2: Preloaded and ready to install.Β EFI Live & EZ Lynk: VIN & vehicle data required. |
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SOTF Support |
SOTF available: Mini Maxx V2, EZ Lynk AA3, EFI Live AutoCal V3 |
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EGR Delete Kit |
Available in Full Delete Kits or as a standalone kit |
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Exhaust Options |
Delete pipe, 4" or 5" exhaust system, Muffler / No Muffler, 4-bolt downpipe configuration |
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Air/Fuel Upgrades |
S&B intake, FASS fuel system, up-pipes, intercooler upgrades |
LML Duramax delete kit options for DPF/EGR/DEF removal
This LML Duramax delete kit collection for 2011-2015 GM 6.6L trucks includes parts that remove emissions restrictions and improve exhaust flow, lowering exhaust backpressure and EGTs.
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Full delete bundles - ship with your choice of tuner (Mini Maxx V1/V2, EZ Lynk Auto Agent 3, or EFI Live AutoCal V3), EGR delete kit, and a choice of exhaust (DPF delete pipe, 4β³ Downpipe-Back, or 5β³ exhaust system). The EZ Lynk and EFI Live kits ship with a SOTF switch for physical power-level switching. All kits use the V-band flange and fit pickups only, Cab & Chassis is not compatible.
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DPF delete tuners - H&S Mini Maxx V1 and Mini Maxx V2 (plug-and-play dash-mounted units, H&S V1 fits 2011-2014 only), EZ Lynk Auto Agent 3 (smartphone app, ships with SOTF switch), and EFI Live AutoCal V3 (SOTF switch included). All flash through OBD-II, no ECM unlock required. Standalone tuners fit both pickup and Cab & Chassis models, except Mini Maxx V2 does not support LGH C&C trucks.
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DPF & CAT Delete Pipe - 4β³ T-409 stainless steel delete pipe with V-band flange and clamp, mandrel-bent, replaces the factory DPF and catalytic converter section. Optional T-409 stainless steel muffler available.
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EGR & Cooler Delete Kit - block-off plates, cooler delete hardware, gaskets, and mounting hardware. Covers 2011-2016 LML Duramax (works on both V-band and 3-bolt flange trucks). Sold standalone or included in a full kit.
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Exhaust systems - 4β³ and 5β³ Downpipe-Back systems with V-band flange for 2011-2015. Both available in T-409 stainless steel or aluminized steel, straight race pipe or with muffler. All bolts, clamps, and hangers included.
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S&B Cold Air Intake - high-flow air intake with cleanable cotton or dry filter, replaces the factory airbox for improved airflow. Intake Bridge - reinforced replacement pipe between the intake elbow and turbo for consistent boost delivery.
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FASS Titanium Signature Fuel System - replaces the factory lift pump to protect the CP4.2 injection system from water contamination - a known reliability concern on LML 6.6L. Higher flow rate and cleaner fuel delivery under tow and high-boost conditions.
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Performance Accessories - replacement Up-Pipe High Flo (available for both driver and passenger side, fits 2001-2016), a 3β³ LML Downpipe for improved turbo exit flow, and a Harness Plugs Kit to cover exposed connector ends after emissions removal.Β
Why Dieselino performance parts are best for Duramax trucks
Dieselino parts use pipe diameter, bungs, and hanger locations that follow GM routing to keep clearance at the crossmember and driveshaft during installation. The fitment baseline is backed by remote support for tuning setup and troubleshooting, warranty coverage on supplied kit hardware, and multiple payment options at checkout.
- Support and fitment guidance from diesel techs.
- Bolt-on routing on most kits, no cutting or welding on factory hangers.
- T-409 stainless pipe options with mandrel bends, welded bungs, and band clamps.
- Tuner support for H&S Mini Maxx V1, Mini Maxx V2, EZ Lynk Auto Agent 3, and EFI Live AutoCal V3.
- Tracked shipping across the U.S. and Canada.
FAQs
For 6.6 LML Duramax truck owners, we recommend the following tuner options:
- EZ Lynk AutoAgent 3 supports remote updates, cloud datalogs, and mobile monitoring.
- Mini Maxx V2 and H&S Mini Maxx add a dash-style screen with live EGT, boost, and regen status.
- EFI Live AutoCal V3 is the common option for custom file loading and advanced tuning control on off-road use setups.
- An LML Duramax delete kit with tuning can commonly boost power +40 to +60 HP on a mild tow file.
- Street files typically land around +80 to +120 HP. Torque gains often +150 to +250 lb-ft.
- Aggressive race files can reach +120 to +140 HP. Peak performance depends on turbo health and fuel supply.
Track boost and EGT logs, because numbers rise fast when the tune pushes 28β35 psi.
On a 6.6L Duramax, fuel economy typically changes by +1 to +3 MPG on the highway with matched tuning and steady throttle. Mixed driving usually lands around +0.5 to +2 MPG, depending on tire size and tow weight. Results drop fast if the boost stays above 25 psi for long pulls or the truck sees heavy stop-and-go.
A 6.6L Duramax engine reliability can be improved from 250,000 up to 400,000 miles with a delete kit when maintenance stays consistent and EGT is controlled. Deleting regen events can reduce fuel dilution, which helps oil hold viscosity longer between changes. Keep maintenance on schedule at 5,000-7,500 miles. Monitor EGT under 1,250Β°F sustained on long grades.
Yes, you can perform an LML DPF delete yourself if you have safe lift support, the right tools, and youβre ready to handle seized hardware and tight sensor access. A full LML DPF delete installation takes 6-10 hours for beginners and 3-5 hours for a shop mechanic. Plan for sockets, long extensions, a torque wrench, penetrating oil, and a sensor socket for tight bungs.Β
A diesel delete kit is not legal for public-road vehicles under emissions regulations and local laws. An LML DPF delete setup is intended for off-road use cases like closed-course racing, private land trucks, or competition-only builds. On-road use can trigger inspection failure, registration issues, and enforcement penalties.