There is a vendor over on the Caddy Forum who is based in Florida. He claims that his company is producing a Supercharger and Turbos for the 3.6DI CTS. I sent him an email suggesting that he get on the G8 forums to see if there was a chance to do the same for the 3.6 SFI in the G8. He thought it was possible. BTW he is developing a Supercharger and turbo for the 3.0 DI. check them out at ..........www.revxtreme.com