Stage 2 Shift Kit:
What it involves – A Stage 2 Shift Kit involves the installation of a new boost valve and boost valve spring, the installation of a new drilled valve body plate, the installation of a new line pressure spring, the installation of new accumulator springs, the installation of a new 1-2 Shift valve, the installation of a new actuator valve spring, the installation of a new cut back valve spring, and many more small modifications to help improve performance of the transmission.
Price - $400 to $700 fully installed
i gotquoted 600 just a week ago for the transgo stage 2 & corvette servo fully installed...drive in, drive out........i was told on these forums the price is "Fair"....but to shop around... try sourcing your parts from Ebay, the trangos kit is $220(i was qouted 300 at my trans mechanic) on there and corvette servo's can be picked up for like $39. (qouted $50)