BMC 1800cc 4 cylinder diesel exhaust valve fitted to 1800cc BMC 4 cylinder engines, Thornycroft T108 marine engines, Tempest marine engines and Sherpa Van engines.
Head diameter: 30.82 mm
Stem diameter: 8.68 mm
Total length: 119.48 mm
Valve face angle: 45 degrees
See item number 19 in the illustration.