Originally Posted by E-Mann

I run the longer shocks and tower with vrp valve pistons, chrome shafts and machined internals. It has really helped keep the back end stable on a very bumpy loose track. If your track is bumpy I would say it's worth it. For smooth Clay I wouldn't bother.

I run with the orings but wouldn't say it's necessary. I have never run without them to see how close it is to having the drive shaft pop out from the center outdrives.

Originally Posted by Krio

The O-rings help prevent the pins on the dogbones from hitting the G-clip and ejecting them. If you switched to snap rings, it doesn't matter.

Originally Posted by daedalus

I run with the long rear tower + shock body on indoor bumpy clay and it helped settle the rear of the car significantly. All of the "fast" local AE drivers run long rear towers at our track.