Katech Street Attack Z06

Katech Performance unveiled their latest program for the Corvette C6 Z06. The result of the program is a 600hp supercar, with new camshaft and exhaust upgrades.
In the stage 1, Katech gets the Z06 to 600 hp and 570 lbs-ft. The price for the Katech Stage 1 Z06 is $8039.44. On the next stage, the Katech Street Attack Z06 gets from 600 to 623 hp and 560-570 hp.
In order to obtain this performance, Katech replaced the valve springs, camshaft and retainers, along with porting the cylinder heads.
source: topspeed.com