LML Duramax EFI Live Custom Tuning — Single File Only (2011–2016)
In-House Off-Road Calibration by Piston Twistin
This product is for customers looking for a single, fully custom EFI Live tune for their 2011–2016 LML Duramax, built 100% in-house by Piston Twistin.
Each tune is developed specifically for your truck’s exact setup, modifications, and intended use — whether that’s daily driving, towing, or performance use. This is not a generic or mass-produced file. Every calibration is built from your stock file and tailored to your goals.
🚨 OFF-ROAD USE ONLY — IMPORTANT NOTICE
This tuning includes off-road / competition-use calibration and is intended for vehicles not operated on public roadways.
✔️ EGR delete support
✔️ DPF delete support
✔️ Off-road exhaust configurations supported
✔️ Proper diagnostic logic handling
By purchasing this product, you acknowledge that your vehicle is used in an off-road, competition, or closed-course environment, and that compliance with all local, state, and federal laws is the responsibility of the vehicle owner.
⚠️ IMPORTANT NOTE ABOUT LML TUNING
Unlike earlier Duramax platforms, LML trucks do NOT support true DSP5 / Switch-On-The-Fly tuning.
For this reason:
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All LML tuning is single-file only
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One tune is flashed at a time
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DSP5 switches are not supported or recommended
If you see DSP5 advertised elsewhere for LML trucks, it is not true SOTF functionality.
🔒 BEFORE PURCHASING — PLEASE READ
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✅ One custom EFI Live tune file
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✅ Built specifically for your truck and mods
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✅ Requires an EFI Live AutoCal or FlashScan (any generation)
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❌ EFI Live device not included (unless selected)
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❌ No DSP5 / SOTF functionality on LML
👉 If you do not own an EFI Live device, please select one of our Preloaded AutoCal options at checkout.
Why Piston Twistin LML Tuning Is Different
Many tuning companies:
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Reuse base files
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Charge extra for turbos, injectors, or CP3 upgrades
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Limit revisions or bill hourly for support
We don’t.
✅ Our LML Tuning Philosophy
As your build evolves, your tuning evolves with it.
🔧 What You’re Getting
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1× Custom EFI Live Single Tune File
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Off-road EGR & DPF delete calibration
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Optimized power, drivability, and throttle response
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Stock factory calibration included
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Unlimited revisions for future modifications
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Direct support from Piston Twistin
Every tune is calibrated individually — nothing scaled, stacked, or copy-pasted.
📊 Typical Power Gain Ranges
(Final output depends on hardware and supporting mods)
| Tune Type |
Estimated RWHP Gain |
Ideal Use |
| Optimized Stock |
+20 HP |
Daily driving |
| Heavy Tow |
+40 HP |
15,000+ lb towing |
| Light Tow / Street |
+60 HP |
Mixed use |
| Street Performance |
+100 HP |
Aggressive daily |
| Max Effort / Built |
+120–200 HP |
Built trucks |
Power levels are discussed and finalized during the tuning process.
⚙️ How the Process Works
1️⃣ Place Your Order
This product delivers one custom EFI Live tune file.
2️⃣ Submit Vehicle Information
You’ll receive a secure form to provide:
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Year & model
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Full modification list
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Turbo / injector / CP3 setup
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Intended use (daily, towing, performance)
3️⃣ Custom Tune Development
1–3 Business Day Turnaround
Your tune is built from the ground up using your stock calibration and optimized specifically for your setup.
Highly modified trucks may require datalogging for final refinement.
4️⃣ Tune Delivery Options
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Email delivery for existing EFI Live users
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Preloaded AutoCal V3 (if selected)
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Bench flashing available if your ECM is locked
❓ Frequently Asked Questions
Is this DSP5 / SOTF?
No. LML trucks do not support true DSP5 switching. Just limits the fueling.
Do you charge for revisions or support?
No. Revisions and support are included for the life of the tune.
Do you charge extra for aftermarket parts?
No. Turbo, injectors, CP3, and supporting mods are all included.
Can I add more tunes later?
Yes. Additional single files (tow, street, race, etc.) can be added for $100 per extra map. Unlimited free revisions per map purchased.
🔥 Get the Most Out of Your LML Duramax
At Piston Twistin, we don’t sell generic files — we build real custom tuning. If you want a properly calibrated, off-road-ready LML tune backed by unlimited support, this is it.
📩 Questions? Email us anytime at Support@PistonTwistin.org
