http://www.tinyrc.com/forums/showthr...=&threadid=590
theres a good thread...
but in general...you cant really have a muffler, most people just have the tips, because that is all u really see
on my Evo, before i used the pen tips, but now i have one from a Muscle Machine exhaust tip...of which i had to do some cutting of my bit...*shakes head
kinda regret it ..kinda dont...