i think that this is a really great idea!! if i had the money i would definetly buy a kit of this nature. i love the features, quality and comprehensiveness of the full kit; but for the vast majority of us out there it is just too expensive.
i would love to have an option like this available because i know that i personally have the ability to complete the kit on my own using the features that i choose. the major hurdle of a turbo kit for most DIY'ers is the turbo manifolds and other miscellaneous piping. most local shops won't even touch this kind of job for a reasonable price. if you guys make this option available, i know that i will be jumping on it as soon as the funds are available!
just a thought, it would be awesome if you guys could allow purchases of individual peices of the kit so that us DIY'ers could work the rest out on our own. i know that you prolly feel like you would be losing money; but, making any sale at all (even if it is only a set of turbo headers) would be better than making no sale because the price of the total kit is just out of reach for most buyers.