^ wat he said!
the only time u will see the exhaust housing bigger then the compressor housing will be on a rotor or a bigger engine eg. V8, truck even ur standard turbo has a smaller compressor housing then ur exhaust housing
being a .63 rear exhaust housing it will provide very fast spool on a 2.5L engine BUT will limit power up high in the rev range but if ur only looking for 260rwkw this turbo wont have a problem giving it to u, this turbo will make alot more power then that i made 276.6rwkw with a standard bottom end with a SR20
the rear exhaust housing has a .86 option so u can always change it at a later date if u want more topend power but the price u pay for more power will be lag
oh im the one selling the turbo by the way