Direct-fit camshaft set for BMW N55 engines

For advanced builds using an aftermarket throttle body

They are designed to replace BMW part #11240618006 in the BMW M30B25

It is only required when you are wanting to change boost settings with a tuning device such as JB4 or Motiv boost box

- If the under-car regulator is not used

Cylinder Head O-Ringing Service, 8-Cylinder BMW Engines M40B18 Direct-fit camshaft set for BMW5150 AutoSport Cylinder Head O Ring Installation Service for 8 Cylinder BMW Engines O ringing an engine cylinder head for high performance, high boost turbo applications provides several mechanical advantages. These advantages primarily focus on improving the engine's sealing capabilities and durability under extreme conditions. Price includes head resurfacing and wash. Key mechanical benefits of O ringing an engine cylinder head: 1. Superior Sealing: