the Stagea 25DET is a killer, easy conversion for the 33 gts4.
We did the conversion in my cousin's car (user: Mr.Massive). Purchased bare engine from JIS in SA, used as many bits as we could from his then current 25DE, coils, starter motor, power steering, oil pressure sender, AFM, etc etc. Just needed to swap the N/A engine sump onto the Stagea motor (so the front & rear diff ratios matched). Then the cool stuff - adding on all the aftermarket bits, Z32 ECU remapped with NisTune, close to 200atw with an r34 turbo @ around 10psi.
200kw atw/25DET + ATESSA = one fast GTS4. Bang for buck.
I f**kin love the thing more than my car...!