Maximize the ROI of "The World's Best"

Your rig is your business. Run it more efficiently.

Kenworth trucks are the backbone of the American highway, known for their durability and driver comfort. But whether you are running a PACCAR MX-13 in a T680 or a Cummins X15 in a classic W900, factory ECU settings leave a lot of potential on the table. Fleet-spec tuning often sacrifices torque and throttle response for generic compliance.

The Stage 3 "Owner-Operator" Performance Module is engineered to reclaim that power. It optimizes the fuel injection timing and boost pressure to deliver better fuel economy on the flats and massive torque on the grades, ensuring your Kenworth runs as good as it looks.

✔ Climb Grades in Higher Gears. ✔ Improve MPG (1-3+). ✔ Reduce Driver Fatigue.

Why Upgrade to Stage 3?

• Maximize Fuel Economy: In this industry, MPG is everything. By optimizing the engine load map, our chip helps you maintain cruising speed with less throttle input, offering potential gains of +1.5 to +3 MPG. It pays for itself in the first few weeks.
• Dominate the Hills: Safely unlock up to +75 ft·lbs of Torque and +60 Horsepower. Keep your momentum up the Rockies or Appalachians and reduce the need to drop gears.
• Smoother Power Delivery: Eliminates the "dead spot" in the pedal when taking off from a stop or pulling out of a weigh station with a heavy load.
• Transmission Efficiency: Works in harmony with Eaton Fuller (Manual & Endurant) and Allison transmissions, helping automated manuals hold top gear longer to save fuel.
• Powertrain Compatibility: Specifically calibrated for the PACCAR MX-11 / MX-13 and Cummins X15 / ISX engines found in Kenworth chassis.
• Zero Downtime Install: Installs in minutes. No mechanic, no shop fees, and no cutting into your wiring harness.

Smart Tuning for Heavy Hauling

Modern Class 8 engines are controlled by sophisticated ECMs. The Stage 3 Tuner acts as a performance efficiency manager.

The Torque Advantage: Diesel engines rely on fuel rail pressure and timing. Our module monitors your load percentage 500 times a second. When you hit a grade, it safely increases rail pressure to provide the torque needed to crest the hill. When you level out, it leans the map for maximum economy.

For the W900/W990: It restores the "big block" feel that older mechanical engines had, giving you immediate response when you mash the pedal.

For the T680: It turns the aerodynamic efficiency into pure profit by reducing engine load at cruising speeds.

100% Safe, DOT Compliant & Reversible

Your license and your rig are your livelihood. We do not compromise them.

Emissions Safe: This device is NOT a delete tuner. It is fully compatible with your DPF, DEF, and SCR systems. By promoting a more complete combustion, it often reduces the frequency of passive Regens.

Warranty & Inspection Safe: The module does not flash the ECM. It leaves no digital footprint. If you are going in for a DOT inspection or dealer service, simply unplug it. The truck returns to stock instantly.

Choose Your Hauling Profile

The Stage 3 "Owner-Operator" spec is our commercial-grade option, designed for maximum profitability.

Frequently Asked Questions

Which plug do I need? (9-Pin vs OBDII)
Most Kenworth T680/W900 models use the round 9-Pin Deutsch connector (Green or Black). Some Medium Duty (T270/T370) models may use OBDII. Please check your port before ordering. We stock adapters for all configurations.

Will this raise my EGTs?
No. The Stage 3 chip is programmed to stay within the safe thermal limits of the PACCAR and Cummins engines. It gains power through timing efficiency, not just over-fueling.

Does it work with PACCAR Automated Transmissions?
Yes. The 12-speed automated transmissions benefit greatly from the added torque, as it prevents them from downshifting unnecessarily on slight inclines, keeping your RPMs low and MPG high.

Is it legal for scales and inspections?
Yes. Because it does not tamper with emissions equipment or bypass any sensors, it is compliant for road use. It is physically undetectable once removed.