02-21-2006, 04:59 PM
dunno. Only difference compared to the new 3.3 revo vs a 2.5 revo is that the 3.3 has the new engine, p2 rockers, 30mm extended chassis, and wide ratio gears installed. Other then those 4 things its the same truck. The center diff is an optional peice and you have to buy that seperatly from the truck.