Originally Posted by DIGItonium

Expect labor to cost at least $3k for a twin turbo install, which factors in the cost of removing and re-installing the exhaust, transmission, and engine cradle before installing the kit. If the shop is fully devoting time to a single car, that would be at least 2-3 days of down time.

Expect to spend at least $1300 on a clutch/flywheel/HD-CSC combo. Technically the labor cost is already included above.

It is recommended to get an aftermarket with more flow for the turbos, and also get high flow cats or test pipes to reduce restriction. Just as a word of caution, the HFC sits right after the hot side of the turbo so it'll destroy the HFC in a matter of months. Your best bet is to place the HFC further down the exhaust path. So far Fast Intentions has a turbo catback setup. Expect to spend at least $1200-1800 for a new exhaust and HFC or test pipes.

Gauges can range from $50-75 to $250-300 each. If you want to replace the stock gauges, the installation is tedious and will cost you 1-2 days worth of labor.

As for the cost of the kits, well you can look that one up.