I,m having the bigger injectors fitted today $1000 supplied and fitted, if you wanted to buy the right ones (fit straight into standard rail) ring FORMAZ on 08 93315599. I have seen the pressure readings from the standard T fuel pump 100 + psi, that is easily enough pressure to make 500bhp, the trouble is (apparently) that the standard pump loses pressure over time. Still it's easy to waste a lot of un-necessary money playing with these things. A dyno can give the answer to wether the car is getting enough fuel etc. At this stage for me I'm going with the logic of. Unichip and bigger injectors equals more fuel delivery, GT-P airbox and snorkel + bigger centre muffler = more cold air in & faster exhaust out. Brakes don't forget the brakes very interested to know how the new injectors are, what cc(flow) and what sort of HP did you make and what boost it can now run