Hi guys, I'm rebuilding an ej255 aiming for around 450bhp with forged internals etc... I've seen its recommended to swap to the more durable sti 6-speed transmission if doing this. Do people usually swap to the r180 rear diff as well and if so are there any good conversion rear axles that you can source in the uk so I dont need to change hubs and everything. Appreciate any guidance as this is my first time doing anything like this, thanks. (07 wrx hawkeye saloon 5mt)