Repl Cyl Sleeve Ford AR 4.490 Bore

The Repl Cyl Sleeve Ford AR 4.490 Bore by DARTON SLEEVES is a precision replacement cylinder sleeve designed for Small Block Ford engines that require bore restoration or custom engine building. This sleeve is essential for restoring worn cylinder walls to factory specifications, allowing engines to accept standard piston and ring combinations without the need for costly block replacements.

Manufactured from cast steel, this replacement cylinder sleeve features a 4.490-inch bore diameter, 8.000-inch height, 4.801-inch outside diameter, and 0.156-inch wall thickness. These specifications ensure a proper interference fit and thermal stability during operation, with the wall thickness providing adequate material for machining bore honing while maintaining structural integrity under combustion pressures.

Engine builders, performance enthusiasts, and restoration shops rely on this sleeve for boring blocks for larger pistons or when original sleeves have been damaged. The precision-cast and honed design promotes even ring seating, controlled oil consumption, and consistent compression across all cylinders in your Small Block Ford engine.