Hey guys, we were able to take a very high quality Valve cover breather, and with some custom parts got it to fit very well on the N54. A Valve cover breather is common on 99% of high horsepower builds, and very important on big boosted motors. If you have no catch cans, and are just VTA like a lot of Single Turbo cars, this will 100% ensure no crankcase pressure under boost, while its one way check ball ensures the crankcase is sealed under vacuum. If you have a single catch can, at high boost it is most likely overwhelmed, and cannot vent all crankcase pressure resulting in power loss, and possible turbo drain, smoking issues. (We run dual catch cans, and are installing this on top of those to ensure no CC pressure as we plan to run a ton of boost) The breather consists of 3 different Stainless Mesh screens, and a high quality check ball, a filter, and Valve cover grommet to ensure a tight seal. We have these on both our shop cars, but may make a few more if anyone is interested. The price would be $199 if enough interest was shown.