This upper ball joint comes in both un-knurled and knurled housing. This is the NOT KNURLED housing version for the upper and knurled housing for the lower. For the all knurled housings see our KIT101K How to Choose? For older trucks that the ball joints have been replaced in the past, or high mileage trucks, we recommend the knurled version. For newer trucks with the original factory ball joints, or low mileage older trucks, we recommend the un-knurled version (BJ130) What It Fits: Dodge RAM 1500 (2006-2008) 4WD 8 LUG Dodge RAM 2500 (2003-2013) 4WD Dodge RAM 3500 (2003-2013) 4WD Note: Lower ball joints are knurled (BJ131)