Originally Posted by jfc_tech
ooopsss... sorry, i though u were asking between .21B & .21T.
my friend said, the fuel economy the most visible fact. the rest is just almost the same. but this on buggy.
I was asking about the .21 "B" and the "E", im thinking on the "E" version (pullstart or roto) to put on a monster truck already powered by a OS .18TZ engine ...