I ran the 5 port very good motor. The turbo plug helps get better fuel millage. It depends on the track, the 5 port has plenty of bodom,I don't know about the 25 might be to much, let someone who ran it tell u that. If you got the 25 i guess you could tame down the bottom by clutch set up and a mild trigger finger. The 5 port is very fast ether way u can't go wrong.