Bro i dont think ABS is such a part which can be installed after market, Bcoz ABS is designed 4 a particular car,its nt tht u buy one and install it.. It contains a computer chip whch at lightening fast speed checks pressure of braking applied at each tyre.. if a tyre is skidding, it lowers the braking pressure 4 tht tyre and may increae the pressure 4 the tyre which is gripping properlly, thus it helps u control ur car while driving in rain or dirty roads etc... So Many things matter, wheight, size, tyre width, grip, braking power.. after considering many things of a car that Computer chip in programmed so that car provided max. braking control without skidding...
I dont think u can get this done by any machenic?? I maybe wrong bt this is wht i knw ebt this...