- The longer stroke in the crankshaft increases the leverage on the connecting rods

1999 - 2003     BMW E53     X5 4

with our robust iron sleeves

such as oil and coolant passages

Knock Control

5150 Xtreme Duty Cylinder Sleeve Set, BMW S54 4244 - The longer stroke in5150 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,