ok i need help, i bought a second hand HPI RS4 3 type-ss that had been hoped-up! the dude that had it also put a meaty new heat sink on the engine swell, i need to know what engine it is so i can go and buy a new sleeve, piston arm and piston when the time arises, don’t ask me why the guy was selling it, he'd spent n arm n a leg hoping up EVRYthing on it and didn’t even run it in .... [8|







any ideas what it is? its a .15 and is very very quick! but thats all i know. lol