I just put one of these motors in my car and finished breaking it in a couple days ago. It is a fast motor with nice throttle response. I think with a little fine tuning it will be very competitive at my local track. A couple things I did notice is that the motor is very tight right out of the box so you really have to let it warm up first at idle especially during break in. The other thing is that even though it is a turbo motor the turbo is threaded for a standard plug. I don't know if this was just a mistake on my motor or if this is how these motors are designed. I have found conflicting info on this matter, however I used a standard hot plug and the motor ran just fine. I hope this helps