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Just got my vette running today, 2006 Z06 - I added a black widow can and cold air intake from Vette-Air. Carlos was a great help. I was able to call him and he talked me through everything I needed also he provided me a tune for the car. It sounds and runs great!
To me, if I were planning to soup up my Z06, it would be worth going a few more cubic inches by using a iron bock(118 lbs more then the LS7 block) LSx454(fully forged). With LS7 heads at 11.5 CR, comp cam 262/270 deg & .686/.658 lift w/LS7 rockers. Use a ported LS7 intake, PTM 92mm and fast 50 lb injectors and a TSP 100mm MAF. Results....692 FWHP@6700 and 617 lb/ft@5,200. That's approx 608 rwhp NA.