i have a picco, tune pipe(xtm) and a 2 speed on it and i love it.all around bad ass motor.i run it way under tune (around 180-200) and it will still blows all 4 tires off around 50-60 mph,the only problem i have with it is i change both spur gears every other tank of gas.i kill the new 3.3 4-tec's easy lol and im not joking at all.im going to the hobby shop tomarrow or tuesday to see if i can get a set of metal spur gears..