dude idk im lost to i can get a y8 head now for like 50 but im broke as hell i just really need to know about the oil resticter and if i need it idc if my car is v tec who needs thats shit lol but no one puts a a6 head on a y8 so idk but thanks for telling me about the head for sale i dont think the oil pump is bad there is no check engine light on u dont think it could be the dash harness could it?