I only used my 6'th gear in my stealth when "cruising" over 95 mph. when racing, I never go into 6'th until about 150 or so. as far as I am concerned, having a 6'th gear is kinda pointless in any car unless the car is going to be going ludicrous speed, or you like setting cruise control at 100+ mph (MuRiX can attest to that ).