Thats, as it says on the can, a 2250. This is a savage with a 2240 for size comparison:
http://www.ultimaterc.com/forums/sho...9&page=6&pp=15. He got 30mph on 5s and he is planning to run it on 10s. Plus, he got the 15t and lehner makes down to a 6t, I think. Definately post a vid of the 4.5, though. I hope it all works out for ya.
JB