Turbonetics kit is $5797.93 retail from Turbonetics web site......................<---that's robbery
What there isn't for this car is an affordable setup, and 8PSI is a safe aim for production, it could be marketed at 20 PSI but shit would blow up, so 8 PSI makes sense from a business perspective. The components in the kit will be good for 400+ WHP, but that's up to the customer. Testing and marketing will be done at 8PSI, which should yeild about 270-280 WHP and 260-270 WTQ and come in around $3,000 +/-.
The prototype is crutial. It has to be made using the components that will be included in the kit, turbonetics components, there's no way around that. What I have on my car is good enough for what it cost me to make the whole set up, $1052. The downpipe needs to be totaly redone, and the first pipe off of the intercooler needs slight tweaking before I'd be happy with anything being produced.