Industrial-grade agricultural transmission speed sensor engineered for high-horsepower Case IH Steiger 4WD, Quadtrac, and STX articulated tractors. Direct OEM cross-reference 87449451.Equipment Fitment:Case IH Steiger 4WD, Quadtrac Tier 4B/Stage V: 280, 330, 335, 350, 380, 385, 400, 430, 435, 450, 470, 480, 485, 500, 530, 535, 540, 550, 580, 600, 620; STX Series: STX280, STX330, STX380, STX430, STX480, STX530.