Repl Cyl Sleeve Brodix SBC 4.110 Bore 4.300 OD

The Repl Cyl Sleeve Brodix SBC 4.110 Bore 4.300 OD from Darton Sleeves is a precision-engineered cylinder sleeve designed for small block Chevy marine engines that demand reliability under demanding conditions. Whether you're rebuilding a boat motor after years of saltwater exposure or upgrading an aging powerplant for tournament performance, this replacement sleeve restores cylinder integrity and extends engine life. Built for boaters and marine mechanics who understand that a properly sleeved cylinder is the foundation of a dependable power package.

This steel cylinder sleeve features a 4.110-inch bore diameter with a 4.300-inch outer diameter and 0.095-inch wall thickness—dimensions engineered for Brodix small block Chevy applications. The 5.535-inch height and controlled tolerances ensure a precision fit that maintains proper ring seal and combustion pressure without compromising cooling jacket integrity. Darton's manufacturing process delivers consistent concentricity and honing surface quality, critical factors when fuel efficiency and power output depend on tight piston-to-bore clearance in a marine environment where thermal stress is constant.

Boaters restoring older small block Chevy marine engines or those upgrading to high-flow Brodix block conversions will find this sleeve essential for maintaining OEM performance standards. Installation requires professional honing and proper press techniques to achieve correct bore finish and alignment—work best left to experienced machine shops familiar with marine powerplant specifications. At 2.09 lbs per sleeve, the product integrates seamlessly into complete block refresh projects where multiple sleeves ensure uniform cylinder conditions across the engine.