2024-2025 Duramax Derringer High Output (671XX)

Fits.

The Banks Derringer High Output boosts your 2024-2025 Duramax 6.6L with more torque for easier towing and climbing. Pick from 6 power modes, including fuel-saving and max power. It talks to your truck’s brain, adjusts on the fly, and even handles altitude changes. Safety features keep your engine and transmission safe. Control it all with the iDash Pro and Bluetooth app. Plus, it’s warranty-friendly and leaves no mess when removed. Simple, powerful, and smart.

Part Number: 671XX

• Adds 86 hp & 178 lb-ft at the wheels
• 6 power levels
• Changed on-the-fly via iDash
• Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
• Warranty friendly
• Works while in cruise control
• AutoRate tunes in real time using vehicle diagnostics
• ActiveSafety protects engine/powertrain
• Transcommand protects transmission
• Real-time bar graph on iDash displays Derringer's added power
• Control, monitor, and update wirelessly via iDash Pro's Bluetooth connectivity

• Click Here w/ Single Alternator
• Click Here w/ Dual Alternators

• Derringer is warranty-friendly. No reflash required, and no trace is left behind after removal.