right i have a 93 wrx wanting to know what mods will give me good gains i have the big air filter straight thru exhaust with uprated manifold not sure what one as this was all done when car was brought also has apexi fc commander running standard intercooler but want to know what other mods i could do would like to maybe see 400bhp 1 day just brought new clutch and flywheel awaiting fitment

 

400bhp will need a rebuilt,forged engine then you will need a strong clutch and a better gearbox,also a fmic.
Bigger injectors,uprated fuel pump,better turbo

 

bliemey ok what is a standard engine good for matey

 

I thought that may shock you
330ish but you will be shortening the lifespan of clutch,engine and gearbox considerably imo as it is an old car.

If i was you i would get a fmic,uprated fuel pump and 440 or 550 injectors (and a remap) and see where that gets you.

 

that was a bloody shock lol how would i know what injectors it currently has and ive just brought a new clutch and flywheel uprated clutch so thats not a problem and same with fuel pump how would i know what it has

 

if they are standard they will be grey (380cc).
Fuel pumpwise you will have to have a look at it