well it depends on what light bulbs ur low beam takes. if unsure remove the bulb thats inthere and have a look. most of the time (series 1 - 2) its H3 and if u have the series 3 housing its H1 for both low and high beam. high beam is allways h1 in the BA
so get the right bulb, get the right colour (ie4000k, 5000k, 6000k etc) and get the desired wattage (ie 35 or 55W) they are all universal kits there isnt a specific one for the BA there is just specific bulbs. all transformers are the same. all bulbs apart from H4 work the same. H4 is a low/high in one and it requires a secondary relay to be wired in to the batery.. a few more wires but same **** in the end