Stevy what year is your 16v, early spec 16v's have 239mm front discs, late spec have 256mm? If your?s is an earlier spec it would probably be worth upgrading, you should be able to get all the parts you need for under ?100 from a breakers, some owners even upgrade to G60 spec i.e. 280mm front dics. I'm not sure about using Mk3 brakes, other than rear Mk3 calipers to replace the rear Mk2 calipers which have a habit of seizing, and the callipers won?t come with the carriers, which cost a fortune new!