Only upgrade is the truggy convertion kit. For some odd reason, I cant drive a buggy 5 feet to the local piggly wiggly, but a truggy I can run all day long.
On the main hyper 8 thread, it shows the little mods (with pictures) that can be done, like swaping the ball ends and such.
And your for sure are going to need a set or 2 of tires, some shock oil of diffrent weights and diff fluid, also of diffrent weight. Should be good to go.
Almost sold mine for 200 bucks, but the truggy kit should be out before next year race season, anyone heard anything eles on that?