The original plastic ones kept popping with even the lowest jumps. Problem is in the flex ant the treath. Use these aluminium shock caps and problem solved! Red looks nice and shiny, must have upgrade. RCMart offers these cheaper as others and the have them in stock.
One of the 1st upgrade you should do to any Traxxas offroad vehicle you plan on jumping a lot. I used them with the Traxxas Black 3760/62 shocks. No more popping shock caps and putting oil all over the chassis.