5150 Xtreme Duty Cylinder Sleeve Set, BMW S55

5150 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, making the cylinder wall much less likely to crack under high performance conditions
– Custom Cylinder Wall Thickness: With the ability to install a thicker cylinder wall, prepare your engine for high performance modifications, including high boost, turbo applications
– Improved Heat Dissipation: By transferring heat more quickly and efficiently, sleeved engines are able to better withstand the higher temperatures associated with high performance applications
– Improved Engine Longevity: By reinforcing critical areas and transferring heat quickly and efficiently, the risk of catastrophic engine failures under high stress applications is greatly reduced
– Compatibility with Performance Modifications: sleeved blocks are better equipped to handle a wide range of high performance modifications such as high compression pistons, forced induction systems, and aggressive cam profiles.

Please note that sleeving an engine block is a complex and precise process that requires the expertise of an experienced machine shop or engine builder.