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Hi they connect to each cam cover the main block breather then the return goes into the sump plug via a adaptor and the big top one vents to atmosphere
I 'm not after buying one I'm just interested in the design, it does look a nice thing but at that money I'd expect it to be baffled, looking at the design I'd say it relies on the 'weight' of the oil in the vapour to seperate it from the air, I'm testing one at present that is baffled but dosen't drain back to the sump, so the sight tube needs checking after each race, so for it's been fine,