.............i'd love to know what a std head will do "really"...........cos i'm at the stage of either bigger injectors and more boost.............or headwork aswell.........but how accurate are R/R's.............................cos i piss 400bhp on light blues, std head and holding less boost than it does on the road.................now that the cars running "mint"...................i'm going to have a ride upto AVA for a power run.......