I have the .21tm.Supposedly the .18tz has more bottom end but same top end.I am using a BUKU pipe to regain the bottom end the the .21 lacks.By far it is a much better motor the the 3.3 not to mention the ease of tuning and holding the tune.Unless you have had the .21 you can't fathom the ease of this motor.


alot of the guys that raced revos here are still using their original telescoping
driveshafts, including bb users

yes they will hold up but they will also twist and the eyes of the yokes get all bent out of shape.I don't think i would take that chance if i was racing!