The Enginetech V1923S exhaust valve features a 1.500" head diameter, 0.3413" stem (11/32" nominal), and 4.921" overall length with Stellite-faced severe-service construction. Fits 1955-2002 GM/Chevrolet/Workhorse 2.5L/3.2L/3.5L/3.8L/4.1L/4.3L/4.4L/4.6L/4...