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Banks Derringer High Output tuner and iDash Pro for 2020-2023 Chevy Silverado HD Duramax 6.6L
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2020-2023 Duramax Derringer: +117 HP Dyno Test

The new Derringer High Output for 2020-23 Chevy/GMC Duramax 6.6L adds a whopping +117 hp and +225 lb-ft of torque, up from 81 hp and 144 lb-ft on the previous generation. The increased power is possible thanks to additional sensor inputs, new engine calibrations, and the impressive computational power of the all-new iDash Pro. The new iDash Pro Powertrain Information Center features a high-res screen viewable at greater angles, wireless updates, expanded internal memory, 25% faster data logging, and 6 direct-connect external sensor inputs with additional features coming soon.

Dyno chart showing +117 wheel horsepower gains on a 2020-2023 GM Duramax L5P with Derringer HO

The Derringer HO features 6 power levels adjustable on-the-fly, with a best gain of +117 hp pushing well above 520 wheel hp to the pavement. The massive increase of +225 lb-ft of torque is situated right in the heart of the powerband where you need it most. Level 6 produces best-in-class performance, while Levels 2–4 are optimized for work use, delivering great mid-range pulling power when hauling a heavy payload or towing a trailer.

Dyno graph showing +225 lb-ft wheel torque gains on a 2020-2023 Duramax L5P with Derringer HO
The Derringer High Output tuner delivers +225 lb-ft of torque right in the heart of the powerband.

Standard in all Banks tuners is AutoRate, which intelligently provides maximum safe power by monitoring boost, RPM, vehicle speed, gear, EGT, and coolant temperature, automatically compensating for high-altitude air density. Our patented ActiveSafety features protect your powertrain with dedicated self-monitoring hardware, avoiding the dreaded “reduced engine power” limp mode condition triggered by lesser tuners. Additionally, TransCommand safeguards the transmission with intelligent torque delivery that prevents clutch slippage and ensures smooth, positive shifts. No competitive tuner on the market offers that level of engineering protection.