Attention: The first 30 or so pages of this thread are outdated.
Please refer to the M4.4 Wikia article where all the relevant information is currently being collated. Before asking any questions please read from at least page 30 on. I know there is a lot of information in this thread, but I can almost guarantee any question you ask has already been answered!
One of the things lacking in the Volvo community is easy tune-ability for cheap. So, for the past month or so I've been working on