Unlock serious power and drivability from your 2021–2022 GM 1500 3.0L Duramax LM2 with Piston Twistin’s complete E66 ECM tuning kit. Built specifically for GM’s Global B architecture, this MPVI3-compatible package is everything you need to tune your LM2 Duramax safely and reliably for off-road performance—no ECM removal required.
🔓 Note: Requires E66 ECM Unlock
🔧 What’s Included in the Piston Twistin LM2 E66 Tuning Kit:
HP Tuners MPVI3 (Blank Unit) The most advanced OBDII tuning device on the market—required to flash custom tunes and log engine data.
HP Tuners Universal Credits (6 Credits) Necessary for licensing and tuning the E66 ECM.
Piston Twistin Custom LM2 E66 Tune File (2021–2023) Professionally calibrated for the E66/Global B platform—optimized for towing, throttle response, and power.
EGR Upgrade Kit (2020–2022 LM2) Reduces soot buildup, improves flow, and helps lower engine temps over time.
Race Pipes (2020–2022 LM2) T409 stainless steel pipes engineered for direct bolt-on fitment and maximum flow.
✅ Why Choose the Piston Twistin LM2 Tuning Kit?
Purpose-built for the 3.0L LM2 Duramax E66 ECM (Global B) platform
Designed for HP Tuners MPVI3
Includes proven EGR and exhaust upgrades for better airflow and long-term engine reliability
Perfect for off-road enthusiasts, towing, and high-mileage reliability
🔩 Exhaust System Specs:
Mandrel-bent T409 stainless construction
Reinforced flanges and contour hangers for easy installation
Leak-proof TorcTite® clamps included
Retains stock muffler (when applicable)
🚛 Fitment:
2020–2022 Chevrolet Silverado 1500 & GMC Sierra 1500
Equipped with 3.0L LM2 Duramax E66 (Global B) ECM
OFFROAD RACE USE ONLY
🖥️ Installation & Requirements:
Windows-based laptop required
HP Tuners VCM Suite software (free)
File created & processed within 24–48 hours of form submission
Remote tuning support available from the Piston Twistin team
