3 Series
As above I'd appreciate any help with this query;
I'm fitting a M44B19 spray bar in to the rocker cover of a E30 M42B18.
http://www.e30owners.com/forums/showthread.php?t=13000&page=12
The spray bar screws in, via a Hollow Bolt (see pics below) to a tapped out/threaded hole in the casting of...