running a looped rail shows true fuel pressure. in oem form i was logging 59 psi. looped it and dropped to 55 psi at idle wot dropped to 52 psi. 7 psi lower than it read in oem form at wot. remember the rail builds pressure from the front back towards the firewall so the 2 back cylinders are running leaner than the others. adding the sl55 pump raised me bak up to 60psi at wot and the car idled like a bone stock car. scaling the injectors is the key to a smooth idle and fast throttle response.
420$ plus shipping would be for the injectors and harnesses from ttm. figure another 300 or so for the modified rail and fittings and hose. thats not a stated cost just my knowledge as to what you could be spending for a complete setup from ttm. not cheap but simple safe and proven.
if anybody wants any of the ttm parts let me know with contact info and ill pass it along to bruce
btw on my final tune i was running 12.2 at wot and ran 11.8 at the 1/4 mile in 80* heat. tuning is the key to all these mods be it stacked, s/c pulley , crank, rails etc etc. find a proper tuner and the parts all fall together. get a canned tune add these parts and you will chase your tail forever.