Performance Valve Springs and Retainer Kit XDP Open Pressure: 375lbs at 1

Open Pressure: 375lbs at 1

While the Xtra Cool Radiator may look like a factory replacement

Coil Bind: 1

Upgrading to the XDP head studs helps to keep the cylinder heads locked down and avoid potential head gasket failures

fuel injector lines

Performance Valve Springs and Retainer Kit XDP Open Pressure: 375lbs at 1Fortify the valvetrain in your 1989 1998 Dodge 5. 9L Cummins when you install the XDP Performance Valve Springs and Retainer Kit XD389. Valve springs are a vital upgrade that are often ignored in many performance builds. The stock valve springs in your Cummins engine are not designed to handle the increased engine RPM or higher boost levels that are common in modified applications. Even typical upgrades like an exhaust brake, aftermarket turbocharger,