I have the JDM 1jzgte and it does cut off right at 119mph. I am running 19x10's on the rear and 19x9's on the front with Eibach suspension. I don't believe the stability is a problem <_< . It's just that when i'm on the interstate and a local ricer pulls beside me, I don't want to be left sitting b/c my car hit the cut off. I'm currently running 12 lbs. of boost and it spools really fast, so I reach 119mph in a very short time. :whistles: