Just a suggestion, need to take a look at those hoses being used. When I did both of my e53 3.0's the hose will collapse due to so much vacuum. (as mine did) I used plastic fuel injector line and made any hose connection as short as possible. Also tried doing this setup with my son's 325xi wagon did not work, kept throwing lean trim codes. We ran the valve cover hose uphill (so the oil would run down/back into the valve cover) then into the air filter box and capped off the manifold vacuum. One more thing I forgot to mention, the clearance between the engine and hood e46 you will have to use close elbow's to be able to shut the hood. Just remember when it leaves the valve cover it has to go uphill immediately so that gravity will pull the heavy oil droplets back to the valve cover. If you run it straight to the vacuum ports you are defeating the purpose of this bypass.