Injectors

Just bought 4 fuel injectors for my 16v Mk1 on ebay advertised as for a Mk1 or Mk2 with a bosch part number 0 437 502 032 however when they arrived they look identical but the threading is much smaller than my old ones. 2 questions; Can anybody tell me what the correct bosch part number is for mk1 or mk2 injectors and has anybody got a way of knowing what the ones i got are from? Google aint telling me too much

smaller thread means they are for late MK1/2 8v and 2.0 16v 9a. to make them fit get yourself a set of 4 9a fuel lines. you will need to tweak the lines a bit but they will fit, my MK1 had 9a lines and injectors: