Valair Clutch Slave Cylinder Kit

Valair is best known among diesel truck owners for rebuilt and performance clutch assemblies, and its hydraulic offerings extend that expertise to the part that actuates the clutch. The Valair Clutch Slave Cylinder Kit listing centers on the Performance Heavy-Duty Clutch Hydraulic Kits, which are master/slave cylinder replacements designed for diesel trucks, particularly Dodge Ram applications with manual transmissions.

What Valair's Hydraulic Kits Are Built For

Valair describes these assemblies as master/slave cylinder replacements for your diesel rig. Rather than selling a slave cylinder in isolation, Valair pairs the master and slave as a matched hydraulic set. That matters on heavy trucks, where a high-load pressure plate demands consistent hydraulic pressure and where a worn factory master cylinder can undermine an otherwise brand-new clutch.

Depending on model year, the kits include either a fixed rod or an adjustable rod for pedal and engagement adjustment. Valair lists kits for second-generation 1998-2002 Ram 2500 and 3500 trucks with the 5.9L Cummins diesel (part number NMU70HYD-02), plus an adjustable kit for later trucks with the NV5600 or G56 transmissions (part number NMU70HYD-03). These are push-type designs with a plastic body and a remote reservoir.

Why Adjustability Is the Standout Feature

The factory master and slave cylinders on these trucks are not adjustable. Valair's optional hydraulics kit for the NV5600 includes an adjustable push rod, which allows the clutch to stay properly adjusted over time. Diesel enthusiast publications that installed the kit alongside a Valair Quiet Dual Disc clutch noted that it let them tune the feel of the clutch pedal until it was just right, taking shifting from clunky to crisp.

Valair also offers a standard-duty, non-adjustable hydraulic set for solid flywheel conversions, with a longer rod for single-disc setups. That version is not intended for dual-disc clutches or pressure plate loads above 3,400 pounds, so matching the kit to your clutch is an important part of the buying decision.

Shopping Considerations

• Model year and generation: The 1998-2002 trucks use a bolt-in firewall bracket design, while later NV5600 and G56 trucks use a different kit.
• Transmission: Confirm whether your truck has an NV4500, NV5600, or G56 before choosing a kit.
• Clutch type: Dual-disc clutches call for the adjustable heavy-duty hydraulics rather than the non-adjustable standard-duty set.
• Replace as a set: Installing a new clutch against an aging master cylinder can leave you with a spongy or inconsistent pedal, so many owners replace both components together.

Explore More

To see everything the manufacturer offers, visit the full Valair brand page. If you want to compare options across makers, browse the complete Clutch Slave Cylinder Kit category.