Just heard from Cummins. This exhaust valve is for the v903 engine. It was used in the Bradly Frighter.
From the Cummins website:
V903 Series: A versatile, capable performer, this compact V8 is ideally suited to continued development of tracked tactical vehicles. Cummins advanced engine research, leading to the demonstration of very high specific ratings, is transferred to the V903. The Cummins V903 Series ranges from 295 kW to 825 kW horsepower.
During Operations Desert Shield and Desert Storm, the Cummins V903 diesel (shown) powered over 2,500 Coalition vehicles (including the Multiple Launch Rocket System and every Bradley Fighting Vehicle in the theater) during Operations Desert Shield and Desert Storm.
Anyone need 266 exhaust valves for this engine......
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"CUCVs - If it's electrical clean it. If it's rubber, replace it" - ralbelt