2011–2015 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 parts collection fits GM Silverado and Sierra 2500HD/3500HD trucks with factory DOC, DPF, and SCR/DEF exhaust hardware. Coverage includes 2011, 2012, 2013, 2014, and early 2015 models using the V-band clamp downpipe connection.
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 - turbo-back exhaust, EGR block-off plates, DPF/CAT delete piping, clamps, gaskets, and hardware for 2011-2015 LML fitment.
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DPF delete tuners - EZ Lynk Auto Agent 3, Mini Maxx V2, H&S Mini Maxx, or EFI Live AutoCal V3 options, with tuning files for off-road use.
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DPF delete pipes - Duramax delete pipe sections, band clamps, and hangers, built for the 2011-2015 V-band downpipe connection and stock exhaust routing.
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EGR delete kits - EGR delete plates, coolant reroute hose, fittings, and block-off hardware to remove the EGR path on the 6.6L Duramax engine without reusing the cooler.
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Exhaust systems - 4" or 5" pipe options, mandrel bends, muffler choice where applicable, hangers, clamps, and downpipes to support turbo-back routing after a DPF delete on LML trucks.
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Air Intake - intake tube, high airflow filter, couplers, connectors, and mounting hardware to reduce restriction on the LML 6.6l platform.
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Fuel Pumps - lift pump hardware, wiring, filters, and fittings for GM diesel setups.
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 EFI Live AutoCal V3, EZ Lynk, and Mini Maxx.
- 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 28–35 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 1,250°F sustained on long grades.
Yes, you can perform an LML DPF delete yourself if you have safe lift support, the right tools, and you’re 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.
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.