Cylinder Sleeve 4.400 Bore 4.370 ID 4.590 OD

The Cylinder Sleeve 4.400 Bore 4.370 ID 4.590 OD by Melling is a precision-engineered engine component designed for serious engine rebuilding and performance restoration. If you're undertaking a complete engine overhaul, block boring, or salvaging a worn cylinder wall, this sleeve is the proven solution that restores bore integrity to original specifications. Built by Melling—an OEM-trusted manufacturer with decades of engine rebuilding heritage—this cylinder sleeve addresses the challenge every mechanic faces when block wear or previous damage limits conventional honing and boring options.

This wet-type cylinder sleeve features a 4.400-inch bore diameter with a 4.370-inch inner diameter and 4.590-inch outer diameter, engineered to fit standard bore configurations in small-block engines. The precision ID-to-OD relationship ensures a tight interference fit during installation, preventing coolant bypass and maintaining proper ring seal under peak combustion pressures. Melling's manufacturing process delivers concentricity tolerances and surface finishes that exceed most performance and stock rebuild requirements, enabling you to run a fresh set of rings and pistons without additional honing operations. The 3.64-pound weight reflects the substantial cast-iron construction that absorbs thermal cycling stress and maintains dimensional stability across extended load ranges.

Mechanics and engine builders rely on this sleeve when bore diameter grows beyond standard oversize limits or when core damage makes traditional boring impractical. Whether you're refreshing a high-mileage street engine, preparing a rebuild for boost or nitrous, or restoring a vintage classic, proper cylinder sleeves preserve your block investment and ensure consistent ring blow-by and oil control. Installation requires careful bore prep, precise honing of the sleeve ID to your piston-ring spec, and correct torque sequencing on the cylinder head—work that justifies OEM-grade components like the Melling CSL1176.