i had the s72 in my hyper 7. that thing ripped but never got a chance to race it but i did race with the hyper 8 port and with that i was keeping up with the mugens and kyoshos but in 1 race my freakin pipe kept falling off and i had to keep fixing it and it took my like a minute to each time and i was still in 3rd place at the end of the race.... should of been first but that night wasnt very good for my buggie cuz in the heat 2 my motor came loose and my clutch bell and spur gear sparked and melted and my car caught some fire but got it fixed for the a main which my pipe problem occured.