In my opinion the RM 250 will outrun all of them if he gets his handleing better. The blockzilla was next till he blew two in 3-4 races. The snowmobile engines sound good and yes are fast one is 550 rotax, two are 440 rotax, and one is a 300 ?, oh and there is an built honda 13 h.p. but rarely races. I really beleive ya'lls outlaws and georges purple petro eater would run all over them. We will find out how they stand against one before long I will be building an Intek 40 c.i. we'll see.