4k where its at.. lol
these a reson they are free....
push rod = loose..
oh and james, my reliable budget n/a 4ac will out perform a budget 4k tubro setup :D responce, toque, reliablitiy... all the things that really matter, i can't stand having to swap motors all the time so I'm making on that i wont have to change :)
more than to have a run against anyone, 4kc or otherwise. would be fun to drive against someone again, even if they are much quicker, gives me somehting to aim for.