I have a set I didn't like them because they didn't produce enough power till around 3K. I found myself shifting a lot more than with my NA LS1. I probably could have gotten used to it but I couldn't wait and bought a Whipple. It has been a while getting it sorted out but I am close. I know someone interested in my turbo setup but have no idea what to ask. I think they are imported turbos but worked very well. Plus I have headers intercooler w/fan and all of the plumbing and controllers. That came from it. Any thoughts?