2015.5–2016 LML 6.6L Duramax Parts Collection
- Featured
- Best selling
- Alphabetically, A-Z
- Alphabetically, Z-A
- Price, low to high
- Price, high to low
- Date, old to new
- Date, new to old
GM HD trucks parts for the 2015.5-2016 6.6 LML Duramax setups
This 2015.5-2016 LML 6.6L Duramax collection fits GM Silverado and Sierra 2500HD/3500HD with DOC, DPF, and SCR/DEF exhaust hardware, plus the factory VGT turbo layout. It targets late-2015 and 2016 models with the 3-bolt downpipe flange and OEM sensor connector layout at the firewall.
All LML delete kit options for late-model trucks
This LML Duramax delete kit selection focuses on emissions removal hardware, freer exhaust flow, and tuned drivability.
-
Full delete bundles - turbo-back exhaust, DPF delete pipe sections, band clamps, gaskets, and hangers, sized for the 3-bolt downpipe.
-
DPF delete tuners - options include EZ Lynk Auto Agent 3, Mini Maxx V2, H&S Mini Maxx, or EFI Live AutoCal V3, with off-road tune support and logging options.
-
DPF delete pipes - Duramax delete pipe sections, sensor bungs, reducers, and band clamps that follow 2015.5–2016 factory routing from the 3-bolt front pipe rearward.
-
EGR delete kits - EGR block-off plates, coolant reroute hose, fittings, and hardware to remove the EGR path on the 6.6L Duramax without reusing the cooler.
-
Exhaust systems - 4" or 5" pipe options, mandrel bends, hanger points, clamps, and downpipes to support turbo-back routing after a DPF delete on late LML trucks.
-
Air intake system - intake tube, high-flow filter, couplers, clamps, and mounting hardware to reduce restriction ahead of the turbo and keep airflow stable under tuning.
-
Fuel pumps - lift pump hardware, wiring, filter assemblies, and fittings for GM diesel trucks with high tow loads.
Dieselino fitment and support for Duramax trucks
Dieselino performance parts follow the 3-bolt flange layout and SCR/DPF routing on late 2015 GM diesels. Tech support confirms fitment, while warranty coverage applies to all provided hardware.
- T-409 steel piping with mandrel bends and welded sensor bungs.
- Tuner platform support: EZ Lynk, Mini Maxx, EFI Live, with file guidance.
- Remote tuning assistance from diesel techs for file setup and troubleshooting.
- Order tracking provided for U.S. and Canada shipments from checkout to delivery.
FAQs
2015.5 and 2016 trucks use a 3-bolt downpipe flange, while 2011-early 2015 trucks use a V-band clamp, so the front pipe hardware changes. DEF, and EGR removal stays similar, but you’ll need to confirm ECM and tuner support before ordering an LML Duramax delete kit.
- EFI Live AutoCal V3 is the best fit for an LML Duramax build when you want custom tune files and deeper control of the engine tables and datalogging. It’s the usual choice for multi-stage setups.
- EZ Lynk AutoAgent 3 works well when you prefer phone-based monitoring and remote tuning support, with quick file updates on a 6.6 Duramax.
- Mini Maxx V2 / H&S Mini Maxx is the simplest option when you want a screen, basic monitoring, and straightforward on-device tune loading.
A correct LML DPF delete tuner presets can add 40-60 HP on tow files, 80–120 HP on street files, and 120-140 HP on race files. Keep sustained EGT under 1,250°F and boost logs in the 28-35 psi range to unlock the full potential of your delete kit.
With EGR delete on a 6.6 LML Duramax, tow tuning often adds 40-60 HP. Steady highway fuel economy usually shifts +1 to +3 MPG. Many customers claim +25,000 to +75,000 miles before major engine work after an EGR/DPF removal with conservative tuning, but results may vary. Oil-analysis comparisons report 40-60% lower soot and roughly 40-50% lower wear metals on modified setups.
Engine performance and engine reliability depend on EGT control and maintenance.
Verify 2015.5–2016 fitment with the 3-bolt downpipe flange and correct sensor connectors.
- Load the tune before installation, then soak fasteners and disconnect sensors.
- Remove the stock exhaust from the downpipe back, keeping hangers.
- Install delete pipes front to rear, align bungs and hangers, then tighten clamps.
- Torque the flange evenly and check driveshaft/crossmember clearance.
- Start the truck, check leaks, and re-torque after one heat cycle.
Time to install an LML Duramax delete kit: 3-5 hours professional installation, 6-10 hours first-time.
A 6.6L Duramax with an LML delete kit is not legal for public-road use, and it is sold for off-road use only. An LML EGR removal kit can trigger inspection failure and road-use compliance issues, even if the truck runs clean and steady. A DPF delete pipe setup may also void warranty coverage on related engine and exhaust claims, depending on the dealer’s policy.