Right now I have the OEM AE pipe that came with the NTC3 kit. I'm sure it would do ALOT better with an aftermarket pipe. I was thinking of an RD logic pipe but I'm not sure which one I'll end up getting..? Also, for more info on the OS tr series check a few threads down in the Nitro engine forums. There is a whole extensive thread on the OS tr.
BTW, I got mine at towerhobbies.