Mean Machine.
yeah the nz has got a slightly larger primary choke (smaller of the two bores) than the GT one, but when I compared a standard GT throttlebody to a bored out one I basically found sod all difference.
however with a modified head or cam, then I beleive that a bored out throttle body may well make a difference and increase the overall power.
however with a modified head or cam, then I beleive that a bored out throttle body may well make a difference and increase the overall power.