Found this separator online. It has larger in/out ports and should scavenge more crankcase gasses than the stock separator. These can be found for under $20. They came stock on BMW X5s. What do you guys think?     http://i00.i.aliimg.com/wsphoto/v0/1389418944_1/E52-E53-X5-Alpina-font-b-Oil-b-font-font-b-Separator-b-font-Crankcase-Ventilation.jpg     http://parts.bmwofsouthatlanta.com/images/parts/bmw/fullsize/42873.jpg

https://www.dropbox.com/sc/f3coezkpko04c41/YWOHR9Q0NA

Make me an offer, + shipping. thx Richhttp://i1138.photobucket.com/albums/n538/rzierer/StarQuest/shift%20boot/IMG_7873.jpghttp://i1138.photobucket.com/albums/n538/rzierer/StarQuest/shift%20boot/IMG_7872.jpghttp://i1138.photobucket.com/albums/n538/rzierer/StarQuest/shift%20boot/IMG_7874.jpg

Make me an offer, + shipping. o2 sensor opening ID measures 5/8".http://i1138.photobucket.com/albums/n538/rzierer/StarQuest/1.jpg