The JCB 32003921 exhaust rocker arm is a genuine OEM component designed for optimal performance in JCB Dieselmax 444 engines. This critical engine part ensures precise valve operation, contributing to the efficiency and longevity of your machinery. It is a direct replacement for the superseded part number 32003774 and is engineered to meet JCB's rigorous quality standards. This rocker arm is essential for maintaining the exhaust valve timing in a wide range of JCB construction and agricultural equipment, including various 3CX, 4CX, 5CX backhoe loaders, Loadall telehandlers, JS excavators, Fastrac tractors, Vibromax compactors, Teletruk forklifts, Robot skid steers, and Mini Excavators.