Performance Valve Springs & Retainer Kit XDP Fuel Injectors XD290 Specifications:

XD290 Specifications:

XDP's HD Gear Reduction Starters feature a motor that is faster

To ensure optimum performance and reliability all the latest design and engineering updates are implemented

***Must send in cores first or add refundable core charge to your order***

Designed for stock rocker arms only

Performance Valve Springs & Retainer Kit XDP Fuel Injectors XD290 Specifications:Fortify 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,