the sirio 3.0 Puts out 1.9 hp and pulls out around 40,000RPM which is really good. I am either going but a HPI nitro 3 ss Touring car and put the sirio 3.0 engine in it or I am going to get the savage 25 and put in the sirio .27 which i think has over 3hp(not sure on that). I dont know which one Im going to do yet. I used to love the T-Maxx until the savage came out. A savage with a .27 in would smoke a t-maxx with a .18. You do have a nice setup though