I have a d15b7 that needs some love and attention. I am looking to get the most out of the little devil. I am planning on getting a a6 cam that can handle turbo and nos. The bottom end will need to be beefed up a lil with some crower rods and from what I have read in the forums are the vitara pistons. I plan on running a turbo with at least 8 or 9 psi and a small amount of nos for the ones those tricky nights when I get challenged. With this type of build what is the best head to use to minum boost to get the most out of the turbo and be able to spray if i have to.