This Supertech manganese bronze intake valve guide is specified for BMW N55/S55 engines with a 6.0mm stem and is sold as a single unit. The listing identifies it as an intake guide and provides the engine family and stem size, allowing technicians to replace worn guides during cylinder head service on the referenced BMW platforms.
Supertech BMW N55/S55 6mm Stem Manganese Bronze Intake Valve Guide - Single (Drop Ship Only)