Port injection kit - BMW N54 N55 S55 Port Injection Kit Gen 2This is the Gen 2 port injection kit from MMP and it is best, lightest, and most cost effective port injection kit on the market for your N54, N55 or S55.. Works on any model series with those engines including F series etc. Material: The port plate and rail is made from Aluminum 6061 T6 and anodized black with laser inscribed MMP logos. Benefits of this kit: 1050 CC Genuine Bosch injectors modified for high flow (with Bosch QR codes inscribed on each