The stock N55 chargepipe is made from hard plastic that has a tendency to crack, especially with the increased load of a Stage 1 or Stage 2 tune. The Evolution M chargepipe is made from stainless steel to easily withstand the pressurized air from the intercooler. Safe, fast and reliable. Comes with OEM O-rings. 

Fits: 

BMW F30/F31/F34/F35 335i (GT)
BMW F32/F33/F36 435i
BMW F20/F21 M135i (EWG or PWG)
BMW F22/F23 M235i
BMW F87 M2 N55
BMW F25 X3 35i