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.
08 335xi Pre LCI Sedan - Titanium Silver - PTF Tuned - M Tech Rear - OEM Black Lines - MMW One-Piece Front Lip - AMS FMIC - BMW PE - BMS OCC - ER CP - Koni Sport H&R Sport Front - Koni Sport w/ Swift 60mm rear springs, Swift Thrust Sheets and OEM Thrust Bearings - ContiContact Extreme DW