Originally Posted by Jye

On the rs4 3 series, you cant use a threaded or sg shaft rear exhaust engine, only standard shaft. You can use the hpi nitro star or if you really wnat a good one use the new 0s tz standard shaft and you can get the pipe from rd logics. here the links to check it all out and maybe i can find the right side exhuast from os too.

heres the engine: http://www2.towerhobbies.com/cgi-bin...?&I=LXJFY6&P=V

heres the tuned pipe from rd logics to use with it http://www.rdlogics.com/cgi-bin/cate...35R&type=store

even though the pipe says rtr3 it works for all of the rs43's.