the exhaust cam hub alone is a significant upgrade to the OEM system

0) 2003-2015

track days

- Genuine BMW Head Gasket

5150 Xtreme Duty Cylinder Sleeve Set, BMW B48 03005-TD7S-S the exhaust cam hub alone5150 Xtreme Duty Cylinder Sleeves, also known as cylinder liners, are centrifugally cast, ductile iron cylinder sleeves. Benefits of Engine Sleeving Include: Increased Bore Size: Sleeving your engine gives the opportunity to increase bore size for higher displacement and increased engine capacity, resulting in more power and more torque Increased Strength: Iron sleeves are stronger than alusil when subjected to high power, high stress applications,