Just installed an ER charge pipe on my n54 e90 today. Easy install and definitely an upgrade to the plastic OEM unit. Also showed me that an oil catch can is a must....nice oil coating in the old pipe!
Also has a method bung if I decide to go that route.
I went with OEM diverters ...no BOV.
E90 2008 335xi - TiAg - AMS FMIC - BMW PE - BMS OCC - ER CP - KW V3 - Vorshlag Camber Plates - AG M359 18" PSS - Alpina Flash - RB PCV Valvle - AFE Intake - Walbro LPFP