Isuzu 8-97141-821-1 Complete Cylinder Head Assembly

This complete cylinder head assembly is precision-machined from cast iron for Isuzu 4BD1 and 4BD1T 3.9-liter inline four-cylinder diesel engines. The unit includes valves, valve springs, retainers, and rocker shaft assembly installed, ready for direct installation. It features an 8-valve OHV configuration with direct injection combustion chambers. Designed as an OEM replacement for Isuzu part numbers 8-97141-821-1, 8-97141-821-2, 8971418211, and 8971418212. Compatible with Hitachi part number 4-1021011-2. Primary applications include Hitachi EX100, EX120, and EX90 series hydraulic excavators, as well as Isuzu NPR, NQR, ELF 250, and ELF 350 commercial trucks. Manufactured to stringent tolerances for optimal compression sealing and thermal stability in heavy-duty industrial and construction equipment operating conditions.