I had one of Aarons highflow turbos in my car for a while and had no problem with it at all and went like the clappers. If you want a cheap upgrade that will put your car basically into the 12's (depends on the car)this is what you want. But I wanted to go fast than that so stupid me went and spent BIG dollars on up grades to the motor and bought T04Z off sliding Performance to go with it. I wish I just stayed with the high flow turbo because of how cheap it was to upgrade and how well it went