It will fit, but it will be weaker. You've got an Evo 1 gearbox currently, (if you're running FWD it likely has a locking collar). The f5m222vrxe is a factory Proton GTi FWD gearbox.
So it will bolt on to 4g63t ? What's weaker in the box ? Current box synchro's in 2nd an 3rd gone an is open centre diff which is making a big clunking noise when clutch is let out . Rebuild it or go with proton box ?
Yeah will bolt on. Dunno whats weaker but one is designed for a 100kw 1.8 and one is designed for a 160kw 2.0. I was running a 1.5 box (65kw stock) on a 93t (145kw stock) in my GSR swapped CC and went through 3 boxes in that time.