just lookin for some information. I will sound stupid but what does the box do in the picture that's above the coil packs? Is it needed as I would like to have my coils on show you see.

Thanks in advance

I think its a vacuum resovoir

Correct

It's some thing to do with either the SAI, N249 or N112 can't remember which, I junked it all at the same time.

Bin it and do then do the n249 bypass.

so this is linked from n249? as hate this thing :p