My 86 535i seems to be leaking at the seal where the injector and fuel rail meet (second one from firewall). I plan on replacing that injector, just in case, and the seals and seats of all injectors and the press. regulator as well. im finding injectors for sale but some are 80$ and some are 50$, the cheaper being described as a 528e injector that fits the 535i as well. The 80$ one is always described as a 535i injector. Anyone know the diff. or have any recomendations??? I also need a recomendation on finding a place that has the seats and seals....cant find those little suckers anywhere! Thanks everyone!!