Black Market Parts (now Precision Raceworks) N55 performance intake manifold, stock location, for most BMWs with the N55. Stronger than the factory plastic manifold, more airflow and less heat soak, centre-flow port-injection provision (fits all injector brands), extra ports for BOV line, boost gauge and direct-port methanol or nitrous; uses OEM O-rings (included) and comes with the injector / rail spacers.