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Throttle Pedal - Kenworth - Cummins Celect/Plus and CM570 or CM870 - Firewall Mount
SKU: 29208001
$895.00 -
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Throttle Pedal - Kenworth or Peterbilt - Cummins Celect/Plus and CM570/CM870 - Floor Mount
SKU: 99208003
$875.00 -
Throttle Pedal - Kenworth or Peterbilt - Cummins CM871/CM2250 or CM2350/CM2450 - Floor Mount
SKU: 99208004
$875.00 -
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Throttle Pedal - Kenworth or Peterbilt- Cat ADEM2/2000/3/4 - Floor Mount - 3 Pin Triangle Connector
SKU: 99108005
+ 1 reviews
$875.00 -
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Throttle Position Sensor - Cat ADEM2/2000/3/4 with Extension Harness - 3 Pin Triangle Connector
SKU: 99108004
$255.00 -
Throttle Position Sensor - Cummins Celect/Plus and CM570/CM870 or Detroit DDEC3/4/5
SKU: 99908001
$255.00 -
Throttle Position Sensor - Cummins CM871/CM2150 and CM2250/CM2350/CM2450 with Extension Harness
SKU: 99208002
$255.00 -
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TPS Extension Harness - Cummins Celect/Plus and CM570/CM870 - Peterbilt NAMUX2/3 - Kenworth NAMUX1/2
SKU: 99208005
$125.00 -
TPS Extension Harness - Detroit DDEC3/4/5 - 5 Wire - Peterbilt NAMUX2/3 - Kenworth NAMUX1/2
SKU: 99308004
$125.00 -
Why the Factory Pedal Won't Talk to Your New ECM
When you swap in a Caterpillar, Cummins, or Detroit Diesel engine, the original throttle pedal and throttle position sensor (TPS) almost never work correctly with the new ECM. Each engine family uses a different sensor and wiring configuration, so the factory pedal simply can’t send the right signal.
- All CAT engines use the same TPS. Older trucks use a triangular 3-pin connector; newer Peterbilt and Kenworth models switched to a square 6-pin Deutsch plug.
- Detroit Series 60 DDEC3/4/5 and Cummins Celect, Celect Plus, CM570, and CM870 share the same sensor body, but the wiring is different (DDEC3/4 uses 3 wires, DDEC5 uses 5 wires, and the Cummins versions use all 6 wires).
- Cummins CM871 and newer (CM2150, CM2250, CM2350, CM2450) use a different sensor that also runs on 6 wires.
Starting around 2013, Peterbilt and Kenworth began using Pulse Width Modulated (PWM) sensors. These only work with Cummins CM2350/CM2450 or Paccar engines. A PWM sensor can be replaced with an analog sensor, but an analog pedal cannot be upgraded to a PWM sensor because the PWM unit is calibrated to the pedal itself.
Our complete throttle pedal kits remove the guesswork. Each kit includes a Williams floor-mount or firewall-mount pedal assembly, the correct TPS for the engine, and (when needed) the proper extension harness so everything connects cleanly to the truck’s firewall wiring.
Pro Tip: Floor-mount and firewall-mount pedals are interchangeable depending on the model of truck. Many customers, especially those with Kenworths, prefer to switch from a firewall-mounted pedal to a floor-mounted one because it is more comfortable - your heel rests naturally on the floor instead of hanging.
Floor Mount vs. Firewall Mount: Which Fits Your Cab?
Throttle pedal kits come in two mounting styles. Ordering the wrong one means the pedal physically won’t install without modification typically drilling new mounting holes, even if the TPS and ECM are correct.
- Firewall mount – The pedal hangs from the firewall and pivots from the top. This style is common on certain Kenworth configurations.
- Floor mount – The pedal sits on the cab floor and pivots from the base. It is used on both Kenworth and Peterbilt depending on the model and year. Most customers prefer this style because the heel rests naturally on the floor.
Customers who already have a floor-mount pedal rarely switch to a firewall mount. The opposite change (firewall to floor) is much more common, especially on Kenworths, for better comfort. Connector style also matters. Older CAT ADEM systems typically use a triangular 3-pin connector, while newer Peterbilt and Kenworth trucks use a square 6-pin Deutsch plug. OEM CAT sensors never came with the 6-pin Deutsch connector - we add the correct connector and wire the sensors in-house so they match the chassis. All of our TPS sensors and extension harnesses are configured here for proper compatibility.
Key Fact: The easiest way to confirm your mount style is to look at where the current pedal physically attaches. If it's hanging from the firewall above the floor, you need a firewall mount kit. If it sits on the floorboard, you need a floor mount.
Frequently Asked Questions
Will any throttle pedal kit work with my engine, or does it need to match the ECM generation?
It needs to match. TPS calibration is specific to the ECM generation (ADEM2/3/4, Celect Plus, CM570/870, DDEC3/4/5, and so on), so confirm your exact ECM before ordering.
Do throttle pedal kits include the extension harness, or is that separate?
It depends on the application.
On CAT applications, the harness is molded directly to the sensor and is included.
On Cummins CM871 and newer, we supply the sensor and the harness together.
On Detroit Series 60 and earlier Cummins (Celect, Celect Plus, CM570, CM870), the sensor and extension harness are sold as separate items. The extension harness is not always required - it depends on the specific truck make and model.
What else needs to be confirmed for full throttle system integration?
Pair your pedal kit with the correct engine harness and confirm any related sensors are matched to the same ECM generation.
Find the Right Throttle Pedal Kits With Kustom Truck Parts
Getting this wrong is one of the most common return reasons we see on throttle pedal kits, and it's avoidable with a five-second look at your existing pedal. Still unsure which mount style your cab uses? Contact our team, and we'll help confirm before you order.
