Just wanted to give them a review and provide more information to the forum. I know when I first started looking into modifying my car I couldn't find an abundance of information on here about reputable local shops.
Greg Connoyer runs the shop and personally does all of the installs. Greg built my car and I have only good things to say about him/his work. My car currently has 38k miles on the clock and about 20,000 of them have been boosted while still on the stock LS3 bottom end. I drive this car every day to and from work and it only gets put away for those bad 2 months or so of the midwest winters.
If you're in the Midwest and are looking for somebody reputable that has years of experience and does fantastic work, definitely give STG Motorsports a call. Greg does great work, is very easy to get ahold of and has very fair/honest pricing. I won't be taking my car to anybody else.
https://www.facebook.com/STGMotorsportsSTL?fref=ts
STG Motorsports
(618) 593-8474