Poppet valve controlling exhaust gas flow out of the combustion chamber. Fits CASE IH 8250, 9250, 420, 470, 500, 500 QUADTRAC, 540, 550, 550 QUADTRAC, 580, 600, 600 QUADTRACK, 620; NEW HOLLAND CR10.90, CR8.90, CR9.80, CR9.90, 480, 550, 650, 780, T9.480 and related models.