Yes it can be install..
The price is depends on what type u of car u drive but can say it is not worth it somemore expensive..
Recommended to use bigger dics and have more pot, just like VR4T is twin pot and Brembo brakes.
Last time my ABS pump got problem cost me RM700. Ended, I take away the fuse(hehe.. no more ABS)
Sensor is not expensive but hard to find as most of Japanese car are without ABS especially for most of Mitsubishi cars..
Even Evo also do not have ABS.. hehe..
Somemore very hard to pass inspection when got ABS if u change engine as last time my fren change his Perdana 4g63 engine to V6 and use back Perdana braking system, then he fail the inspection on braking..at the end he cut off the ABS system and reinspect again.. very wired.. passs..(without ABS)...
Good Luck to you..