I removed my forge blow off valve a few weeks ago when i took my car in for regular maintenance. i seemed to have lost the longer screw that came with the adapter. every parts store i go to say they don't have anything like it, nor can they get it. i have a hard time believing this. Does anyone know the thread pitch and size of the stock bolt, or what type it is. thank you in advance.

 

RealOEM illustrated parts lists show most of the hardware, including thread descriptions. You should find what you need there --- http://www.realoem.com/bmw/index.do

 

Thanks a bunch, I'll see if I can find it!