Eagle Jeep 4.2L 258 3.895in Cast Crank 6.123in I-Beam Rods -10.8cc 3.915in Pistons Rotating Assembly

This Eagle Street & Strip rotating assembly gives you the core components to rebuild or upgrade the heart of your Jeep's 4.2L 258 engine. You get a 3.895-inch cast steel crankshaft, 6.123-inch 5140 steel I-beam connecting rods with 3/8-inch ARP 8740 bolts, and 3.915-inch forged 4032 ICON pistons featuring a -10.8cc inverted dome. This assembly also includes plasma-moly file-fit piston rings and King rod and main bearings, providing a solid foundation for your engine build.

Designed for pump gas and naturally aspirated street applications, this assembly is built to handle the demands of everyday driving while offering improved performance over stock. The cast steel crankshaft offers good durability for street use, and the 5140 steel I-beam rods are well-suited for naturally aspirated setups. The forged 4032 pistons are a strong choice for street performance, and the included file-fit rings allow for precise gapping to match your engine's needs. The King bearings are known for their reliable performance in street applications.

When rebuilding your engine, it's important to ensure all components are properly balanced and clearances are set according to manufacturer specifications. This assembly is intended for naturally aspirated, pump gas street vehicles and is not CARB approved, meaning it cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and break-in procedures to ensure the longevity of your new rotating assembly.