The N54/N55 aluminum replacement chargepipe is a great high quality low cost upgrade to your flimsy factory plastic chargepipe. The piping is 3"" throughout preventing any possible flow restriction, the throttle body flange is CNC machined for a factory fit, and the aluminum piping powder coated black for a great looking and long lasting finish. Each pipe includes dual 1/8"" NPT bungs, high pressure t-bolt clamps, and all hardware required for installation. This is simply the best value for stronger N54/N55 chargepipes out there. E chassis N54 and N55 only. Does not fit F chassis N55. Comes with TiAL Replica BOV and ALL Hardware necessary for installation.