Update: For our Group Buy members, we are now offering an upgrade to our GTX V3 Twin Turbo Kit.
If you are currently signed up for the MHI Turn-Key Kit, you can upgrade to the GTX V3 Turn-Key Twin Turbo Kit for an additional $2,000. This would bring the price of the kit to $7,595!
Keep in mind that with the Turn-Key version of the GTX V3 Turbo Kit, you are getting 1,100cc/min Bosch EV14 injectors and an Aeromotive 340lph Fuel Pump with 3" downpipes and external wastegates.
If you are currently signed up for the MHI Tuner Kit with External Wastegates, you can upgrade to the GTX V3 Tuner Twin Turbo Kit for an additional $1,500. This would bring the price of the Tuner Kit to $6,495!
For more information on this new option, see this thread here for the announcement:
GTM Performance Engineering: GTX V3 Twin Turbo Kit