stock is 259CC, minimum you want with boost is 370cc for a T25, 370cc with 4 bar fuel for the T28 and if you go T3 you need at least MSD 50lbers in my opinion. If you go with 370cc injectors, they are a stock item and you can get them from www.jgycustoms.com www.sr20performance.com or andreas miko on the forums here. IF you want msd injectors, just hit up the same people or go on ebay for them.
brent
brent