East Texas Motorsports had an AWESOME GTO with the STS setup. Came very close to buying it when it was put on the market. I'm sorry, but anything that you can do to get 1000+ H.P, is freeking cool!
Several GTO guys swear by their STS kits, I was seriously considering getting one until the wife said no more mods to the Camaro until she gets her new swimming pool.
Next winter, watch out! There WILL BE at least one IOM 2SS/RS M6 running the streets of SoCal with an STS kit!