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[HaveBlue]

9-12 PSI??? Whoa! I was having issues just trying to push 7.5 psi.

Here's a breakdown of what I spent:

$1,900 on 2nd gen TRD S/C (Christmas special)
$300 on 305cc injectors
$350 on Edelbrock headers
$300 on Apex'i S-AFC
$550 on Aquamist water injection system
$150 to have adapter plate for water injection made
$500 for TRD exhaust

So, yes, $4000 is a good figure. However, will your turbo kit include larger injectors, intercooler, complete exhaust system (not just turbo manifold), injector controller, boost controller (if applicable) and any other supporting hardware? Overall, I spent $4000 on everything. If your kit starts at $4000 and only inlcudes the turbo manifold, turbo, intercooler and piping, I really don't see a high demand for it. If, however, you can price it competetively with the supercharger and it's supporting hardware and include all the injectors, piping and other hardware, you will probably have one helluve racket!