A heavy dually towing show cars does not just need more pedal. It needs more usable power, quicker response, and better control. Here, the gain came from stacking the right pieces together: a Derringer inline tuner for added output, a Banks Ram-Air Intake System to reduce inlet restriction, and a 5-inch Banks Monster Exhaust System to help the Duramax exhale with less backpressure. PedalMonster cleaned up the soft throttle feel, while the iDash DataMonster gave in-cab monitoring and on-the-fly adjustment of both Derringer and PedalMonster. The result was a truck that pulled harder, responded quicker, and shifted through the power with a completely different feel.
The video centers on Gu Fet's GMC Duramax, a one-ton long-bed dually built to tow show cars. The owner wanted more power and better drivability under load, so the truck received a collection of Banks upgrades targeting airflow, tuning, exhaust flow, drivetrain protection, monitoring, and throttle response.
To support the additional power demand, the truck received a Banks Ram-Air Intake.
The system's massive air filter is highlighted as a key part of the upgrade, helping improve the Duramax's ability to breathe while supporting the truck's towing-focused performance goals.
A Banks Derringer tuner was added to provide more usable power.
The additional power was especially important for the owner's primary use case: towing show cars. Combined with the intake and other upgrades, the Derringer changes how strongly and responsively the truck pulls under throttle.
On the exhaust side, the truck received a Banks 5-inch Monster Exhaust.
The system is described as having zero back pressure and complements the intake and tuning upgrades by reducing exhaust restriction. Together, the modifications address both sides of the engine's airflow path.
The build also includes a Banks Ram-Air Differential Cover.
Its inclusion expands the project beyond engine performance alone. Because the Duramax is intended to work as a serious tow vehicle, the upgrade package also addresses the drivetrain.
Inside the cab, an iDash DataMonster provides powertrain monitoring and control.
The display is compared to an Apple Watch for the truck, giving the driver access to vehicle data while also allowing control of the Derringer and PedalMonster. Both can be adjusted on the fly through the iDash.
The owner describes a dramatic difference in how the truck drives after the upgrades.
Throttle response is noticeably improved, but the change goes beyond initial pedal response. He also points to the way the truck delivers power and how the transmission shifts through that power, describing the overall difference as night and day.
The transformation becomes especially apparent during a spirited drive when the long-bed dually gets sideways.
For a one-ton truck built primarily to tow show cars, the moment demonstrates how dramatically its response and performance have changed. The combination of the Ram-Air Intake, Derringer, Monster Exhaust, Ram-Air Differential Cover, iDash DataMonster, and PedalMonster turns the GMC Duramax into a considerably more responsive tow vehicle while retaining its original working purpose.
