injector upgraged Options

[replica250]

ok ive been doing some digging on the net at posible upgrade injectors for my uk 3sge st202 celica gt 1994 year, its seems that standard are lite green toped 295cc?
brown are 250cc and the pink top flow 315cc?
is this correct if so if standard ones are green can i use pink injectors with no ill affects to running etc dont really want to have to spend 80 quid per injector from blitz as id have to use a piggy back or stand alone ecu with a avlue of more than i paid for the car in the forst place!
so in summery can i use the uprated injecotrs from nippon denso flowing 315cc and not have to mess with the car at all, may be just fit a fpr,
or does anyone know of any other altratives and where to sorse them from?
cheers jay

[replica250]

375cc. nothing ive read sugests that yet i need to find out from a shop that auto datato be sure, for agument sake if there is some slitly larger one avalble i thought it whould add a little more power, ive got a power deck and k&n cold air intake and ngk iex plugs and magicore leads but the fueling is still standard.