I just made 192rwkw in my silvia with these mods.
CA18DET stock
KKR 330, 18psi boost
Hi mount manifold
Sard 534cc inj
z32 afm
600x300x75mm fmic
Remapped stock ecu
walbro fuel pump
Not sure how reliable they are but they make some power.
Its a track only car, so I haven't driven it yet.