SPRK-2521-2BM-T1

or S52 valvetrain with a Ferrea Valve Kit for superior heat resistance

Boost pressure: 8-9 PSI

CP-Carrillo pistons are the best choice for any S85 engine and application

super capacitor for backup power (up to 3 days)

5150 Xtreme Duty Cylinder Sleeve Set, BMW S63 S65B46 SPRK-2521-2BM-T15150 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,