Cylinder Sleeve 4.300 Bore 7-1/2 OAL 4.270 ID

The MELLING Cylinder Sleeve 4.300 Bore 7-1/2 OAL 4.270 ID (Model CSL287) is a precision-engineered cast iron sleeve designed for engine block reconditioning and cylinder restoration. This universal fit component serves as a critical solution for rebuilding worn or damaged cylinders without the need for full block replacement, making it an essential part for machine shops, engine rebuilders, and automotive technicians working on vintage and custom engines.

With a 4.300-inch bore diameter, 7.5-inch overall height, and 4.270-inch inner diameter, this sleeve accommodates standard large-displacement engine builds. The 0.125-inch wall thickness provides structural integrity and thermal stability during high-heat engine operation. Cast iron construction ensures durability and proper heat dissipation—critical factors in engine longevity and performance consistency. The sleeve's specifications allow it to restore cylinder geometry to factory tolerances, enabling proper piston ring sealing and reducing blow-by in rebuilt engines.

This product is ideal for rebuilding classic cars, hot rods, marine engines, and industrial powerplants where original cylinder blocks remain serviceable but require bore restoration. Engine builders and machine shops rely on MELLING sleeves to extend block life and restore compression without costly full-block replacement. The universal design accommodates various engine applications within the 4.300-inch bore range, making inventory management simpler for professional shops and serious enthusiasts.

MELLING has established itself as a trusted OEM and aftermarket supplier of engine rebuilding components for decades. This cylinder sleeve meets the material and dimensional standards expected in professional engine machine work, delivering reliable performance in demanding applications where precision bore restoration is non-negotiable.