Pro X Intake Valve Suzuki Dr-Z400 / Lt-Z400 / Kawasaki Klx400R / Kfx400 The Pro X Intake Valve is expertly engineered to serve as a seamless replacement for original equipment manufacturer (Oem) valves. Our product not only meets but also surpasses OEM standards, all while offering a competitive price point. Features: Manufactured from premium-grade steel Can be used in combination with all of the OEM valvetrain components Offered in many dirt bike and ATV applications. Sold individually.