I'm currently running a 58mm ball-bearing turbo on one of our T3 kits on my personal car and have been VERY happy with its streetability. Spool and transient response are great and it is rated to 565hp by Precision. It is sized just slightly larger than a Garrett 3076R which is another good option for 500+whp at maximum while retaining good drivability for everyday use.

Tom

 

I am going with a ETS 61mm turbo, built motor and meth this spring and hoping to hit over mid 500 whp with it. ETS makes some of the best kits in the market. Cant go wrong with ETS. Give them a call.