These speaker sizes are driving me nuts. After visiting an ICE dealer he said they are 5 1/4inch in all four door, but need adaptors to make them fit (fair enough). After looking at umpteen websites looking at adaptors I get 2 different Autoleads part numbers SAK-1104 & SAK-1107. I think one is 130mm and the other is 165mm. My car is a 2003 A4 Avant and I want to swap the front and rears. Please help this is driving me crazy!