Whether your truck is getting you to and from work, hauling equipment, towing your camper or carrying your family it has a job to do. Our job is to keep your truck dependable.
At Knox Performance Diesel and Offroad we specialize in Ford Powerstroke diagnostics, testing, maintenance, repairs, and performance upgrades.
From the legendary 7.3 to the 6.0, 6.4 and now the 6.7 Powerstroke platforms our team as the experience, equipment and the continued training to properly diagnose and repair your truck right the first time.

Check engine lights, drivability concerns, electrical faults, and intermittent issues all start with proper diagnostics. Your vehicle's cooling system helps regulate engine temperature and prevent overheating. Let us inspect and repair any issues with your cooling system to keep your engine running smoothly.
From fuel contamination and injector concerns to CP4 failures and fuel filter housing leaks, we diagnoses and repair Powerstroke fuel system issues the right way.

Loss of power, overboost conditions, actuator faults, and turbocharger failures are common concerns we diagnose and repair on Powerstroke trucks
Cooling system concerns can quickly become expensive repairs. We diagnose coolant leaks, water pump failures, degas bottle issues, thermostats, and overheating concerns

Whether your truck is stock, used for towing, or built for performance, the transmission is one of the hardest working components on the vehicle. We provide transmission diagnostics, transmission services, transfer case maintenance, transmission tuning, cooler upgrades, thermostat upgrades, and repairs for Ford Powerstroke trucks. From 6R140 and 10R140 transmission concerns to towing performance and reliability upgrades

Powerstroke oil leaks can come from several locations. We identify the source of the leak before recommending repairs.
We diagnose and repair DEF, DPF, EGR, and emissions-related concerns on modern Powerstroke trucks.
From minor repairs to complete engine replacement and rebuild projects, our team can help keep your Powerstroke on the road

From worn steering components to suspension concerns and towing-related wear, we help keep your truck handling properly.

Turbos, injectors, lift pumps, tuning support, head studs, and supporting modifications for Powerstroke owners looking for more.

Modern Powerstroke trucks rely heavily on electronics and communication networks. We diagnose electrical and wiring concerns properly before replacing parts

Oil changes, fuel filters, transmission services, coolant flushes, differential services, and mileage based maintenance designed to keep your truck reliable.
Knox Performance Diesel and Off Road
126 South Park Street, Killeen, Texas 76541, United States