mine maxes out at 114-115. But without the proper balancing of EVERYTHING there's no point in ever ever going over that. Yea, I turned mine off. Raced a nissan 300zx and got to 120 and things started getting shaky. It's not fun. Rack and pinion at those speeds will throw you off the road with a sneeze. Don't do it. Just because there's a snotty little ricer boy with a Honda doesn't mean you gotta outrun him top speed wise. You wanna do that then save up and get a GT500 or a GT40. Otherwise just make your sixer go from 0-60 in 'ooooh shhhhh!!!' fast time.