This is a Holley Air-to-Air Intercooled STS Twin Turbocharger system without tuner and fuel injectors for the Chevy Corvette C6 2008 LS3 which will get you horsepower and torque gains of 30-50 percent over stock. That’s power that you can feel! STS rear mount turbo systems come complete with all the components needed for an OEM quality installation, right down to every nut and bolt along with a full color installation manual to walk you through the installation.