Duramax Allison Tuning (2001–2016) | PistonTwistin LLC

Transform your Duramax into the truck it was meant to be.

Our custom EFI Live tuning for 2001–2016 Duramax trucks with Allison transmissions delivers the perfect balance of power, efficiency, and reliability. Whether you daily drive, tow heavy, or want all-out performance, PistonTwistin LLC has the calibration that fits your build.

Why Choose Our Tuning?

✅ Eliminate throttle lag & dead pedal
✅ Gain up to +120 RWHP on stock transmissions
✅ Tow safer with optimized shift strategies
✅ Improve MPG while adding power
✅ Remote support & free lifetime updates

ECM Tailored Power Levels

• Stock Optimized (+20 RWHP)

• Heavy Tow (+40 RWHP)

• Light Tow (+60 RWHP)

• Street (+100 RWHP)

• Sport (+120 RWHP – max safe for stock trans)

• DSP5 (5-position switchable)

Easy Install Options

• AutoCal V3 Pre-Loaded Device – plug-and-play ready

• Bench Flashing Service – send us your ECM/TCM, fast turnaround with free shipping both ways

• Email Delivery – for existing AutoCal/FlashScan owners

The PistonTwistin Difference

Every calibration is built in-house, tested, and backed with unlimited revisions to grow with your truck. From stock fuel systems to compound turbo builds, we’ll keep you dialed in.

⚡ Built for Performance. Proven for Reliability. Trusted by Duramax owners nationwide.

MOTORSPORT USE ONLY