Repl Cyl Sleeve LS1/LS6 3.890 Bore 4.180 OD

The Darton Sleeves Replacement Cylinder Sleeve LS1/LS6 (Part No. 300-024) is a precision-engineered cylinder sleeve designed specifically for GM LS-series engine blocks. This 3.890-inch bore, 4.180-inch OD sleeve provides OEM-quality restoration and performance enhancement for LS1 and LS6 engine builds. With a 0.145-inch wall thickness and 5.600-inch height, this steel sleeve ensures proper bore geometry and ring seal integrity for both stock and modified engine applications.

The LS1/LS6 cylinder sleeve is manufactured to exacting tolerances that restore worn or damaged cylinder bores to factory specifications. A properly installed sleeve eliminates the bore runout and taper that develops in high-mileage engines, restoring compression, reducing blow-by, and improving oil control. The steel construction withstands the thermal cycling and combustion pressures inherent in both naturally aspirated and boosted LS applications. For engine builders and restorers, this Darton sleeve represents a cost-effective alternative to complete block replacement while delivering reliable long-term performance.

This sleeve is ideal for LS engine enthusiasts performing top-end rebuilds, addressing cylinder wear without full machine work, or preparing a block for turbocharging or supercharging where OEM bore dimensions must be maintained. Whether you're restoring a classic vehicle with an LS swap, rebuilding a high-mileage engine, or building a street or race motor, the correct bore diameter and OD sizing ensures proper piston-to-wall clearance and allows for standard piston and ring selection without oversizing complications.

Darton Sleeves has been the trusted name in cylinder sleeve technology for automotive and marine engine builders for decades. Their LS-series sleeves are engineered to match factory bore specifications and wall thickness, ensuring that once installed, your LS block will perform as the original design intended—or better, if combined with performance upgrades. Each sleeve ships ready for professional installation and honing.