Key Features

  • Adds +86hp +17lb-ft
  • 6 power levels that can be changed on-the-fly via iDash.
  • Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
  • Warranty friendly: no reflash required and no trace left in ECM after removal
  • 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 Data Pro displays Derringer's added power
  • Update iDash and Derringer firmware wirelessly via Banks' intuitive mobile app.

Tuning Bundle Includes

  • Derringer High-Output Tuner
  • PedalMonster Throttle Response Controller
  • iDash Pro Powertrain Information Center

Add Power, Improve Response, Monitor Vehicle

Banks all-new Derringer High Output tuner makes merging, passing and uphill climbs while towing easier than ever. Derringer brings the 2024-25 Chevy/GMC Duramax 6.6L from 438 hp and 928 Ib-ft to an impressive 519 hp and 1068 Ib-ft that you can feel.

The system includes your choice of the all-new iDash Pro or iDash Data Pro Powertrain Information Center, the most advanced automotive evaluation tool. The Derringer system communicates with the truck's ECM to adjust the tune in real-time, even compensating for altitude. Patented ActiveSafety circuitry protects the engine and transmission, and the Derringer is warranty-friendly, leaving no trace left behind after removal.

Power Gain

Chart showing the added horsepower undser the curve for the Derringer HO
Wheel Horsepower
Wheel Torque

Even with the updated stock power figures for the 24+ models, Derringer puts down a best gain of +86 hp, pushing near 520 wheel hp to the road. Plus, the massive increase of +178 Ib-ft of torque is situated right in the heart of the power band where you need it most.

Power for every situation

Derringer features 6 power levels, each with a calibration engineered for a specific task. Unlike other tuners, you can change Derringer’s power levels as you drive, using the iDash Pro itself, or the Banks mobile app.
2024+ Derringer High Output Power Levels
  • Level 1 — stock
  • Level 2 — fuel economy*
  • Levels 3-4 — work and heavy towing
  • Levels 5-6 — max power

All levels are safe to tow thanks to Derringer’s real-time monitoring of exhaust gas and coolant temperatures, transmission slip, and other data points.

*Fuel economy varies based on driving habits and payload.

Boost Control Where You Need It

Derringer provides a huge increase in torque across the working range of the engine between 2200 and 2800 RPM. We accomplish this by controlling midrange boost. Look at the yellow zone. Mid-range boost equals mid-range torque.
Chart showing the added boost used in the Derringer HO

We’ve built 26,000 JLTV engines for the U.S. Army using the same tuning approach that we’re now applying to your Duramax. The midrange is where you work your truck.

Power You Can Use

Most interstate onramps are about 1,100 feet. This means you have only 1,100 feet to reach 70 mph. And, the heavier you tow, the harder this becomes. We loaded a Tacoma into a trailer and hitched it to our ‘24 Duramax. Gross vehicle weight was 20,065 pounds. The stock ‘24 Duramax took 1,279 feet to reach 70 mph. With the Derringer set to level 6 (max power), the rig reached 70 mph in just 1,085 feet. The Derringer-tuned truck hit 70 mph 194 feet sooner than stock. It was safely merging with semis while the stock truck was still accelerating past the merging zone, fighting semis for a lane.
Bank Derringer HO 2024 L5P Merging Power
Bank Derringer HO 2024 L5P Passing Power
Merging Power
Passing Power

Derringer's added power becomes even more pronounced when passing up a grade, while towing. Passing on the highway with a 20,065 lb GVW rig up a 7% grade, Derringer rocketed the truck from 45 mph to 70 mph a full 8.5 seconds quicker than stock.

Pushing on to 75 mph, the stock tune runs out of steam on the top end while Derringer continues to pull strong. The gap between stock and Banks widens to a full 12.41 seconds and nearly a quarter mile of separation.

ActiveSafety® Health Monitoring

Banks combines mechanical fail-safe measures to revert to stock in the event of internal failure while also intelligently adding power based on vehicle operating conditions, such as cold or hot coolant temps or knock from bad fuel.
ActiveSafety illustration

Derringer is the only tuner available with Active Safety® health monitoring circuitry:

  • Internal diagnostics checks the system 100 times per second
  • Checks MAP and FRP signals and monitors CPU activity
  • Activates in the event of failure or loss of 12-volt power
  • Bypass relays smoothly return stock power with no loss of power or "Limp Mode"

TransCommand® Active Transmission Safety System

Closeup of transmission internals

Derringer High Output is calibrated to modulate power during shifts for better clutch engagement. Thanks to its OBD connectivity, Derringer knows when the GM/Allison 10-speed transmission is shifting gears. It reduces its added power momentarily to allow for a smooth shift. Competitive tuners have no idea or simply ignore when the transmission is shifting and continue to add power, overspeeding the transmission and causing long-term damage.

  • Intelligent Shift Tuning — Gear shifts are optimized for each power level to protect the transmission and increase shift speed while protecting against torque converter and clutch slip.
  • Accelerator Pedal Monitoring — Rolls in additional power progressively, optimizing for both part-throttle fuel economy and maximum power when you want it.

Includes iDash Powertrain Information Center

Derringer includes iDash Pro, the most advanced iDash ever. The iDash Pro Powertrain Information Center is a microcomputer that allows you to monitor and record what’s actually going on under your hood, as well as control Derringer, PedalMonster, and more. The compact device blows away the capabilities of any OBD plug-in diagnostic device and offers more functionality than instruments 5X the price.

Information At Your Fingertip

Screen 1
Screen 2
Screen 3
Screen 4

Monitor up to 8 gauges on 5 customizable screens. That's 40 gauges at the touch of a button. Quickly change gauges, layouts, colors, and pages via intuitive buttons or a tap or swipe on the mobile app. Connect up to 4 iDash Pros to see even more information at once. See what data iDash Pro® can display for your vehicle.

Bluetooth App Makes It Easy

The Banks mobile app for Apple and Android makes setup, configuration, and updating the iDash Pro® easier than ever.

  • Select and move gauges
  • Change color themes
  • Switch screen layouts
  • Easily look up parameter definitions

Wireless transfer of data logs coming soon for iDash Data Pro users.

Torque Response Curves

PedalMonster improves take-off and mid-range punch by reshaping your vehicle's torque delivery with smooth multi-point curves and predictable throttle feel. Choose between 30 selectable Torque Response Curves: High Torque, Midrange, and High Performance, each with 10 curves.
Banks PedalMonster
Pedal Commander

By comparison, Pedal Commander and all other throttle controller boxes rely on a single point with an abrupt knee you can feel through your throttle input. This makes part-throttle drivability twitchy, difficult to modulate, and causes your transmission to hunt for gears.

Launch Trim

If you've selected an aggressive Master Torque Response Curve for maximum mid-range punch, but find it too aggressive at low speeds, choose from 5 levels of Launch Trim to soften torque delivery below 10 mph.

Choose Your Control

PedalMonster can be used as a stand-alone device, controled by Banks' free mobile app for a stealthy install.
Banks Power App for PedalMonster and iDahs Pro
Standalone App Control
iDash Pro Control

Pair the PedalMonster with an iDash Pro or Data Pro to be able to adjust pedal settings on the fly and open up a whole world of data not available on your vehicle’s dashboard. See what data iDash Pro can display for your vehicle.

With Bluetooth connectivity built in, new features and support for other vehicles can be added over-the air. No computer required.

Exclusive Safety Features

ActiveSafety®
Launch Rate
Reverse Safety
Trans Select

There are dozens of throttle response controllers on the market like Pedal Commander, Sprint Booster, iDrive, just to name a few. Each of them claims to be the most advanced. Thanks to its OBD connectivity and patented safety features, the PedalMonster Torque Booster has very little in common with these brainless devices.

OBD Connectivity Brings Safety

PedalMonster connects to the vehicle's Onboard Diagnostics (OBD) port to access +12v and vehicle data. This reliable power source and real-time vehicle information is used to provide smooth, speed-based Active Torque Curves and important safety features.

Throttle Response Controllers like Pedal Commander draw power from the accelerator pedal circuit, often overloading the circuit and leading to dead pedal and an inoperable engine.

Dumb devices like these don't know the vehicle's speed, gear, or transmission time. In fact, they don't even know that they're in a vehicle.

About This Product

Banks all-new Tuning Bundle includes the Derringer High Output, iDash Pro® Powertrain Information Center with mobile app, and PedalMonster throttle controller. Derringer High Output adds +86hp +178 lb-ft with 6 safe power levels adjustable while you drive. Communicates with the truck's ECM to adjust the tune in real-time, even compensating for altitude. ActiveSafety circuitry protects the engine and transmission. Warranty friendly.

Bundle Includes

  • Derringer High-Output Tuner
  • PedalMonster for use with iDash
  • iDash Pro® Powertrain Information Center
Specifications
  • Adds +86hp +17lb-ft
  • 6 power levels that can be changed on-the-fly via iDash.
  • Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
  • Warranty friendly: no reflash required and no trace left in ECM after removal
  • 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 Data Pro displays Derringer's added power
  • Update iDash and Derringer firmware wirelessly via Banks' intuitive mobile app.
Installation and Support

Tuning Bundle for 2024-2026 Duramax 6.6L

High Output Tuner with iDash Pro® and PedalMonster

SKU #Tuning 2024 Dmax

2024-2026 Chevy/GMC 2500/3500 6.6L Duramax, L5P

Adds +86 hp +178 lb-ft. Includes new iDash Pro® Powertrain Information Center and PedalMonster throttle controller. Warranty friendly.

Save $299 with Bundle Introductory Price iDash Stealth Pod Sold Separately
$1,608.35
MSRP: $1,907.78
Pairs well with
Banks Ram-Air®
$495.00
MSRP: $550.00
50 state compliant
D-161-167 for 2024-2025
2026 EO Pending | Not For Sale In CA
Tuning Bundle for 2024-2026 Duramax 6.6L

Key Features

  • Adds +86hp +17lb-ft
  • 6 power levels that can be changed on-the-fly via iDash.
  • Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
  • Warranty friendly: no reflash required and no trace left in ECM after removal
  • 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 Data Pro displays Derringer's added power
  • Update iDash and Derringer firmware wirelessly via Banks' intuitive mobile app.

Tuning Bundle Includes

  • Derringer High-Output Tuner
  • PedalMonster Throttle Response Controller
  • iDash Pro Powertrain Information Center

Add Power, Improve Response, Monitor Vehicle

Banks all-new Derringer High Output tuner makes merging, passing and uphill climbs while towing easier than ever. Derringer brings the 2024-25 Chevy/GMC Duramax 6.6L from 438 hp and 928 Ib-ft to an impressive 519 hp and 1068 Ib-ft that you can feel.

The system includes your choice of the all-new iDash Pro or iDash Data Pro Powertrain Information Center, the most advanced automotive evaluation tool. The Derringer system communicates with the truck's ECM to adjust the tune in real-time, even compensating for altitude. Patented ActiveSafety circuitry protects the engine and transmission, and the Derringer is warranty-friendly, leaving no trace left behind after removal.

Power Gain

Chart showing the added horsepower undser the curve for the Derringer HO
Wheel Horsepower
Wheel Torque

Even with the updated stock power figures for the 24+ models, Derringer puts down a best gain of +86 hp, pushing near 520 wheel hp to the road. Plus, the massive increase of +178 Ib-ft of torque is situated right in the heart of the power band where you need it most.

Power for every situation

Derringer features 6 power levels, each with a calibration engineered for a specific task. Unlike other tuners, you can change Derringer’s power levels as you drive, using the iDash Pro itself, or the Banks mobile app.
2024+ Derringer High Output Power Levels
  • Level 1 — stock
  • Level 2 — fuel economy*
  • Levels 3-4 — work and heavy towing
  • Levels 5-6 — max power

All levels are safe to tow thanks to Derringer’s real-time monitoring of exhaust gas and coolant temperatures, transmission slip, and other data points.

*Fuel economy varies based on driving habits and payload.

Boost Control Where You Need It

Derringer provides a huge increase in torque across the working range of the engine between 2200 and 2800 RPM. We accomplish this by controlling midrange boost. Look at the yellow zone. Mid-range boost equals mid-range torque.
Chart showing the added boost used in the Derringer HO

We’ve built 26,000 JLTV engines for the U.S. Army using the same tuning approach that we’re now applying to your Duramax. The midrange is where you work your truck.

Power You Can Use

Most interstate onramps are about 1,100 feet. This means you have only 1,100 feet to reach 70 mph. And, the heavier you tow, the harder this becomes. We loaded a Tacoma into a trailer and hitched it to our ‘24 Duramax. Gross vehicle weight was 20,065 pounds. The stock ‘24 Duramax took 1,279 feet to reach 70 mph. With the Derringer set to level 6 (max power), the rig reached 70 mph in just 1,085 feet. The Derringer-tuned truck hit 70 mph 194 feet sooner than stock. It was safely merging with semis while the stock truck was still accelerating past the merging zone, fighting semis for a lane.
Bank Derringer HO 2024 L5P Merging Power
Bank Derringer HO 2024 L5P Passing Power
Merging Power
Passing Power

Derringer's added power becomes even more pronounced when passing up a grade, while towing. Passing on the highway with a 20,065 lb GVW rig up a 7% grade, Derringer rocketed the truck from 45 mph to 70 mph a full 8.5 seconds quicker than stock.

Pushing on to 75 mph, the stock tune runs out of steam on the top end while Derringer continues to pull strong. The gap between stock and Banks widens to a full 12.41 seconds and nearly a quarter mile of separation.

ActiveSafety® Health Monitoring

Banks combines mechanical fail-safe measures to revert to stock in the event of internal failure while also intelligently adding power based on vehicle operating conditions, such as cold or hot coolant temps or knock from bad fuel.
ActiveSafety illustration

Derringer is the only tuner available with Active Safety® health monitoring circuitry:

  • Internal diagnostics checks the system 100 times per second
  • Checks MAP and FRP signals and monitors CPU activity
  • Activates in the event of failure or loss of 12-volt power
  • Bypass relays smoothly return stock power with no loss of power or "Limp Mode"

TransCommand® Active Transmission Safety System

Closeup of transmission internals

Derringer High Output is calibrated to modulate power during shifts for better clutch engagement. Thanks to its OBD connectivity, Derringer knows when the GM/Allison 10-speed transmission is shifting gears. It reduces its added power momentarily to allow for a smooth shift. Competitive tuners have no idea or simply ignore when the transmission is shifting and continue to add power, overspeeding the transmission and causing long-term damage.

  • Intelligent Shift Tuning — Gear shifts are optimized for each power level to protect the transmission and increase shift speed while protecting against torque converter and clutch slip.
  • Accelerator Pedal Monitoring — Rolls in additional power progressively, optimizing for both part-throttle fuel economy and maximum power when you want it.

Includes iDash Powertrain Information Center

Derringer includes iDash Pro, the most advanced iDash ever. The iDash Pro Powertrain Information Center is a microcomputer that allows you to monitor and record what’s actually going on under your hood, as well as control Derringer, PedalMonster, and more. The compact device blows away the capabilities of any OBD plug-in diagnostic device and offers more functionality than instruments 5X the price.

Information At Your Fingertip

Screen 1
Screen 2
Screen 3
Screen 4

Monitor up to 8 gauges on 5 customizable screens. That's 40 gauges at the touch of a button. Quickly change gauges, layouts, colors, and pages via intuitive buttons or a tap or swipe on the mobile app. Connect up to 4 iDash Pros to see even more information at once. See what data iDash Pro® can display for your vehicle.

Bluetooth App Makes It Easy

The Banks mobile app for Apple and Android makes setup, configuration, and updating the iDash Pro® easier than ever.

  • Select and move gauges
  • Change color themes
  • Switch screen layouts
  • Easily look up parameter definitions

Wireless transfer of data logs coming soon for iDash Data Pro users.

Torque Response Curves

PedalMonster improves take-off and mid-range punch by reshaping your vehicle's torque delivery with smooth multi-point curves and predictable throttle feel. Choose between 30 selectable Torque Response Curves: High Torque, Midrange, and High Performance, each with 10 curves.
Banks PedalMonster
Pedal Commander

By comparison, Pedal Commander and all other throttle controller boxes rely on a single point with an abrupt knee you can feel through your throttle input. This makes part-throttle drivability twitchy, difficult to modulate, and causes your transmission to hunt for gears.

Launch Trim

If you've selected an aggressive Master Torque Response Curve for maximum mid-range punch, but find it too aggressive at low speeds, choose from 5 levels of Launch Trim to soften torque delivery below 10 mph.

Choose Your Control

PedalMonster can be used as a stand-alone device, controled by Banks' free mobile app for a stealthy install.
Banks Power App for PedalMonster and iDahs Pro
Standalone App Control
iDash Pro Control

Pair the PedalMonster with an iDash Pro or Data Pro to be able to adjust pedal settings on the fly and open up a whole world of data not available on your vehicle’s dashboard. See what data iDash Pro can display for your vehicle.

With Bluetooth connectivity built in, new features and support for other vehicles can be added over-the air. No computer required.

Exclusive Safety Features

ActiveSafety®
Launch Rate
Reverse Safety
Trans Select

There are dozens of throttle response controllers on the market like Pedal Commander, Sprint Booster, iDrive, just to name a few. Each of them claims to be the most advanced. Thanks to its OBD connectivity and patented safety features, the PedalMonster Torque Booster has very little in common with these brainless devices.

OBD Connectivity Brings Safety

PedalMonster connects to the vehicle's Onboard Diagnostics (OBD) port to access +12v and vehicle data. This reliable power source and real-time vehicle information is used to provide smooth, speed-based Active Torque Curves and important safety features.

Throttle Response Controllers like Pedal Commander draw power from the accelerator pedal circuit, often overloading the circuit and leading to dead pedal and an inoperable engine.

Dumb devices like these don't know the vehicle's speed, gear, or transmission time. In fact, they don't even know that they're in a vehicle.

About This Product

Banks all-new Tuning Bundle includes the Derringer High Output, iDash Pro® Powertrain Information Center with mobile app, and PedalMonster throttle controller. Derringer High Output adds +86hp +178 lb-ft with 6 safe power levels adjustable while you drive. Communicates with the truck's ECM to adjust the tune in real-time, even compensating for altitude. ActiveSafety circuitry protects the engine and transmission. Warranty friendly.

Bundle Includes

  • Derringer High-Output Tuner
  • PedalMonster for use with iDash
  • iDash Pro® Powertrain Information Center
Specifications
  • Adds +86hp +17lb-ft
  • 6 power levels that can be changed on-the-fly via iDash.
  • Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
  • Warranty friendly: no reflash required and no trace left in ECM after removal
  • 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 Data Pro displays Derringer's added power
  • Update iDash and Derringer firmware wirelessly via Banks' intuitive mobile app.
Installation and Support

Overall rating: 4.9591837 / 5 from 98 reviews.

AI Generated Review Summary

The Tuning Bundle for 2024-2026 Duramax 6.6L offers significant power enhancements and smooth performance, with customers appreciating the noticeable difference in acceleration and power. The easy installation process and functionality of the product are also praised, along with the active safety circuitry that protects the engine and transmission.

Summary topics

  • Customer Satisfaction (9%): It was observed by customers that they were very happy with the results of the product they purchased.
  • Engine Power Enhancement (11%): Opinions vary, but the Derringer is awesome and greatly enhances the engine power.
  • Smooth and Consistent Power (23%): A significant amount of customers expressed appreciation for the smooth and consistent power provided by the Derringer HO.
  • Overall Performance (9%): Customers loved the incredible performance of the product, which was mentioned multiple times in the reviews.
  • Noticeable Performance Difference (15%): A significant number of customers loved the noticeable difference in acceleration and power of the truck after installing the pedal monster.

Review topics: ["power","difference","performance","issues","instructions","results","improvement","truck","customer service","video","feel","install","quality","experience","banks","derringer","increase","output","kit","pedal","throttle response","app","level","combination","lag","gains","idash","wait","update","upgrade"].

Review highlights

  • "Easy installation with a good video and written instructions available on the website."Paul P.
  • "The added power is nice, it's like driving a different truck!"Jason M.
  • "Throttle response, mid range power and torque had a significant increase!"Bryan P.

Reviews

best kit I've ever ordered

"For anything. Anywhere. Instructions were clear, step by step, were actually doing the job I was doing not "similar job on different vehicle". Everything I needed was included in the kit, parts are high quality - I have never in 35 years of spinning wrenches seen a better packaged "you will not have any questions" solution than this. This should be the standard the entire world operates on."

Joshua H. (5/5)

On the fence

"Install was simple enough. Many different settings to choose from. Truck started throwing some codes after installed. Troubleshot that for a bit, now parking brake service keeps coming on. The parking brake may or may not be unrelated but I will find out. So im on the fence for now if this was a good buy or not."

Rey C. (3/5)

Derringer High Output

"First off, I don’t usually do reviews. The Derringer is awesome! The choice of multiple levels is exactly what I needed. After the installation, I pulled a camper from Denver to Salt Lake using level 2 and averaged 16. 5 miles to the gallon! Last week I was hauling round bales, 8 at a time, using level 3 and was not lacking any power. The combo of the Pedal Monster makes it the perfect power when I need it device. Couldn’t be happier. Thanks Gale."

paul b. (5/5)

26 Duramax

"I bought the components piece by piece and installed them myself the installation was very simple (if you carefully follow the installation instructions provided by Banks) I punched the I Dash Pro and Pedal Monster Bundle I have added the air filter component and the larger inlet and outlet cooling tubes and I love it! Acceleration, torque, horsepower is incredible! I have learned the transmission power application and really enjoy driving everyday. I have been purchasing components from Banks for 45 years and have always been highly satisfied"

Robert W. (5/5)

Wow Banks!

"Installed the derringer with the banks ram air intake and absolutely love it. So I order the exhaust and going to get the turbo inlet and boost tubes. Gotta love the research the company puts into the durability for use of their products. Super happy with everything so far."

Brandon S. (5/5)

Derringer high output and pedal monster

"Was super easy to install and definitely woke up my L5P! One thing I did different on the Install with the I dash pro was drill the hole in the Windshield pillar for the wiringin a different spot so that I can reuse my factory cover if I wanted to remove it."

Mark B. (5/5)

Works great!

"It’s a completely different truck! I had to take it out for warranty work done ended up driving it for a week without it. I’m happy I made the purchase it’s worth it to me it’s really a different ride."

Robert J. (4/5)

For keeping factory warranty it’s amazing

"I was hesitant about purchasing this tuner as most off shelf tuners do not provide the power they claim, but this one blew my mind. I highly recommend this tuner for anyone looking to keep factor Warranty"

Andrew A. (5/5)

Absolutely Awesome

"The Banks Derringer has completely improved my AT4 response and power when pulling my 20k trailer and tractor, and you can feel the power."

Kevin S. (5/5)

power bundle

"So far i had to send the idash for up date but that went great and waiting to see the results of being able to tune the whole bundle."

Jeff B. (5/5)

Q&A

I have a 2025 2500hd duramax and I wanna know what you recommend to stay #Warranty and emissions, friendly but I want a lot more turbo sound and a more of a diesel truck sound not obnoxious because I’d still like to pull trailers but definitely more turbo sound? Thank you Jamie
A cold air intake would be the right answer but its currently being tested for CARB compliance.
Would this kit void my warranty?
The stance on aftermarket parts varies widely from dealer to dealer. This is why we suggest consulting with your dealer to learn how they choose to enforce Stellantis' warranty policies. Generally speaking, there are three types of dealerships. 1. Dealers that embrace and install performance upgrades. 2. Dealers who will overlook an aftermarket part because they know it's harmless. 3. Dealers who are militant about aftermarket accessories and will deny a warranty. You'll find dealers across the US and Canada that sell and install Monster-Rams. You'll also find dealerships that will encourage you to keep the vehicle stock. In the case of the Monster-Ram, keeping it, stock could prove to be a costly decision if the grid heater fails.
Does the Tuning Bundle for 2024-2026 Duramax 6.6L remove the speed limiter or increase the top speed past 98 mph?
The Derringer will add +86 hp and 178lb-ft.+ but it doesn't remove the speed limiter.