We have the ESP Twin Turbo kit for the street. This will bolt onto stock or Champion Aluminum heads. The ESP twin Turbo kit includes all external components. The Standard ESP Twin Turbo kit will support up to 800 hp. We are working on another, Stage 2, that will support up to 1,200 hp. The kits are similar. We have not decided if the second kit will have an Air/Air intercooler or a liquid/intercooler yet. Most people have been asking for different things every time and they all seem to be customized so far. See www.espperformance.com for more details.