XDP XD389 Performance Valve Spring & Retainer Kit 89-98 Dodge Ram 5.9L Cummins AFE-51-72002 AEV's unique design adds un-matched

AEV's unique design adds un-matched protection all while maintaining the Colorado's transmission cooling requirements and will not allow debris to become packed around the transmission pan

With Dorman's Pan design

the ArcFlow will the air into the intake plenum creating noticeable gains

and when allowed to become warn

XDP XD389 Performance Valve Spring & Retainer Kit 89-98 Dodge Ram 5.9L Cummins AFE-51-72002 AEV's unique design adds un-matchedOne of the most overlooked performance parts in most 12V Cummins performance builds is the valve springs. They may not be something you can see, but we can assure you, they are essential in ensuring your engine is operating properly with all your other performance parts. The factory springs are not designed to handle the elevated boost levels that are typical in modified applications causing valve float. This will drastically hurt your engine