Not 100% sure, BSW says they are 6.5" midbass and 2.5" tweeters. I always thought most 316/318s had 4" for midbass and 1" tweeter. Most all BMW's are straight forward once you get to the mounting holes. Getting to them is always a pain in these cars. They make it difficult to tear apart, but they are well built cars. Do a little more digging before purchasing. Someone else may chime in.
-There are 10 kinds of people. Those who understand binary, and those who do not.
-If we ever forget that we are One Nation Under God, then we will be a nation gone under...Ronald Reagan