Stiffer T-maxx Shocks
the only way to make them stiffer is to put a lot of spacers in there. If you ever do buy new shocks I recommend the traxxas big bore shocks, I could drop mine from 6 feet straight down and the chassis wouldnt hit the floor. I also recommend rpm rims and pro line tires, the rims widen the stance over an inch and the combo takes over a pound of weight off the truck. good luck