The 5 port is a great truggy engine, really doesn't lack anything, but for my taste the .25 is the key for truggy, it has a bit more bottom than the 5 port .21 and just as much top if not more, with .21 runtime. i have seen and felt that less throttle input is needed to get as far, it put' the powerdown very well and is Nat's worthy.

The 7 port turbo is also a great truggy engine, it makes more bottom than people relize, good clutch set up and a 053 pipe and you will have a monster on your hands.