I can't figure out why they don't. The GTR is $90k and the 370Z is $32K...isn't there enough of a gap between these two prices to attract people who want more power for a reasonable amount of money ? Nissan twin turbo'd the GTR, so why can't they put smaller turbos on a 370Z and make it a 370ZTT and attract a whole other segment of the sportscar market ?