I ditched the rb20 for the rb25 which is an awesome upgrade and definitely recommend. The car came with a front mount intercooler and the twin pipes exhaust.
RB25 remains stock internally.
Haltech E11 V2 ecu
Sard 850cc injectors
split fire coils
bosch 044 fuel pump
6 boost manifold with high mount setup
GT35/40 turbo with 63 rear housing for quick boost. running on 23 psi as a daily and a thrasher. So far has lasted with this setup for about 1year to 1 year and half with only minor hickups.
tial 44mm external gate plumbed nicelly back into exhaust
high flow cat
BP ultimate always
blitz dual solenoid boost controller
Extreme heavy duty clutch
all this is good for 387.3 rwhp at autoworx.
and roughly 720Nm torque.
I had my car tuned originally at c red and was putting out 398 rwhp but had it retuned by cypher industries only a week before dyno comp to 346 rwhp. Nothing had changed between the retune and the dyno comp except a little octane booster and a different dyno. Just goes to show the difference of different dynos.