Throttle Pedals

Swapping to a Caterpillar, Cummins, or Detroit Diesel engine in your heavy-duty truck typically renders the factory throttle pedal or throttle position sensor (TPS) at a minimum, incompatible—the original throttle pedal assembly does not have the correct TPS to allow throttle response now that you have completed the engine conversion. Kustom Truck Parts offers conversion-specific TPS, TPS extension harnesses, and throttle pedal kits featuring premium Williams floor-mount or firewall-mount assemblies, engineered for seamless integration in Kenworth, Peterbilt, Freightliner, and Western Star chassis.

Each kit delivers direct-fit reliability:

  • Williams pedal assembly (floor or firewall mount for your cab layout)
  • Matched TPS sensor (engine-specific calibration for precise throttle input)
  • TPS extension harness (connects directly to firewall bulkhead wiring)
  • All necessary hardware for straightforward installation

Proper TPS matching ensures smooth, accurate throttle response, full power delivery, and safe drivability as if the engine were factory-installed.

Browse below for your engine ECM generation and chassis fit. Pair with our engine harnesses (NAMUX/Legacy/Adapter) for complete electronic integration and optimal performance. Need help choosing floor vs. firewall mount or confirming TPS compatibility? Contact our team for expert guidance on your conversion build.
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