sikz28

I have been reading through the other posts and everyone says to go with rod ended phb's for auto x, road racing, but wouldn't the axle need to wrap around far enough to break the drive shaft before rod ends on the phb would even come into play?

I thought the phb only moved in an arc when going over bumps?

Z28SORR

You may be confusing the PHB with the LCA and Torque Arm. The PHB does not stop axle wrap, it centers the rear axle (side to side). Axle wrap is controlled primarily by the Torque Arm.
There are several reasons for using the adjustable rod ends on cars that are "raced". The less rubber in the suspension the quicker (better) it respond to changes (inputs). When lowering or changing the wheel/tire combo. the axle can be recentered for proper clearence at the wheel well. They are usually stronger/ stiffer, improving control. This is of course at the expense of more vibration though the frame.
There are three types currently available. One with both ends having poly (plastic) which is stiffer than rubber and is OK for someone that only occasionally races and is using stock components. One that has one poly and one rod end. This allows for adjustment with lowered suspensions or different wheel/tire combo's. and doesn't transfer as much vibration as the double rod end type.