This is an optional ST Racing Concepts Heat Treated Steel Driveshaft Kit, and is intended for use with the Traxxas electric Stampede and electric Rustler trucks. These universals carry the same design elements as ST Racings popular Slash 2wd universal kits: large diameter universal driveshaft bones, strong carbon steel for the axles with two sets of pin holes, carbon steel joints and joint pins and also carbon steel diff outdrives. All done to provide more durability against the power of today's Lipo battery/Brushless motor combos. These are an excellent upgrade for your Monster Jam/Stampede or Rustler trucks.
This product is expected to arrive on Thursday, July 16 2020