i dont know the company that tuned it. but i do have his number. i jsut need to call him. ive been really busy lately and havent had the time. but there is a video on you tube where they put a twin kit on a corvette c6 and there was NO turbo lag at all.

heres the link(watch in order)

http://youtube.com/watch?v=SMB14OOfgss

http://youtube.com/watch?v=2B2mwgsvikY&feature=related