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Valve Assembly

Genuine OEM Valve Assemblies

A failing valve assembly can disrupt fluid flow, pressure regulation, or airflow anywhere in the drivetrain — leading to fault codes, derated performance, or a system that simply won't function as designed. Because valve assemblies are precision components engineered to exact tolerances, a generic replacement often fails to seal, actuate, or regulate correctly. That's why every valve assembly in this collection is genuine OEM, matched to the manufacturer's original part number.

What's in this category

This collection covers genuine OEM valve assemblies for heavy-duty trucks and diesel equipment, including components used across fuel, cooling, air, and hydraulic systems. New listings are added regularly as inventory expands.

Why order your valve assembly here

  • Genuine OEM only — every assembly is matched to the manufacturer's original part number, not a generic equivalent
  • Built for accurate fitment — listings include the exact OEM number so you can verify the right part before you buy
  • Fast turnaround — ships quickly to minimize downtime and keep your equipment running right

FAQ

What does a valve assembly do? It controls the flow of fluids, gases, or pressure within a system — regulating fuel delivery, coolant flow, air pressure, or hydraulic pressure depending on location, to keep the system within design parameters.

Signs of a failing valve assembly? Fluid leaks, erratic pressure readings, loss of system performance, flow- or pressure-related fault codes, or an engine entering derate mode.

Genuine OEM or aftermarket? All parts here are genuine OEM — no generic substitutes.

How do I find the right part? Match the OEM number on your old assembly, or check your service manual, then search that number above.

Browse the full selection below, or search by OEM part number to find your exact match.

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$275.00 - $275.00
$275.00
$275.00 - $275.00
$275.00

K056040 Genuine Paccar High-Flow ABS Modulator Valve Assembly

Paccar

Product Overview The K056040 is a genuine Paccar ABS modulator valve assembly designed for compatible Paccar anti-lock air brake systems. This high...

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$275.00 - $275.00
$275.00
$275.00 - $275.00
$275.00