right im confused i have a xr3i gearbox in my turbo its a efi engine with 195 chip biege injectors std intercooler and made 169bhp at totd but when i drive it it revs very high for the speeds im doin its bout 6000 revs at only just over 100mph is this down to the gearbox or is it something else just want to know if a turbo box would help my cruising speeds ??????????