what is the best hop up i can get for a shockwave?

sh.18 using the engine replacement program....

definatly a better tuned pipe and the O.S cr-rx (a little more power than the SH ), also don't forget the alluminum shocks, they make a world of difference

Aluminum Shocks are a huge improvement. Also might want to get some of the 5 spoke wheels from redcat since the solid plastic yellow ones seems to crack along the beads. You can reuse your rubber if you need to, but get tire foams for an evader BX from tower hobbies ($6) when you reinstall.
Also a FREE and easy mod that will give you more bottom end punch is to pull your pipe apart and remove the diffuser cone inside. put RTV on the two halves of the pipe screw back together let dry and your set.
enjoy.

new pipe, new air filter and header. if you realy want it to rip put a os cvrx un it[)]