[Hans-Olof Blom]

There are 3 bolts that are difficult to mount. At least on my ERA. You can probably figure which ones.

Since the flanges on the primary pipes have slots you can mount the difficult bolts before the primary pipes.

One warning the gasket has holes and not slots!

Last time I mounted the primary pipes, I did it in less than 1 hour. Earlier it took about 1 hour just to mount the most difficult screw.