Tubular Upper Control Arm Vendors

My delrins require the inner shell only. Poly bushings require inner and outer. Delrin is superior to urethane and used in many high performance OE applications.

They make aftermarket pivot pins that don't have the step down for the inner shell to be pressed on for use with poly bushings. No inner shell needed with those, they already have the correct diameter without it. I use the greasable pivots that are also available with poly bushings, no inner shell needed and the pin is the proper diameter so everything fits as intended.

Standard (non-greasable)
mancini-racing-lower-control-arm-pivot-poly-23.gif
Mancini Racing Lower Control Arm Pivot, Poly

And greasable for use with poly bushings (so you don't have to worry about them squeaking!)
lower_control_arm_pins_chrysler.JPG
Firmfeel Mopar Suspension and Steering