Del West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in professional motocross. With over 4 million dollars invested, their technical staff continues to push the outer limits of development in materials, coatings, design concepts, and manufacturing dimensional control in their own material laboratories, engine testing rooms and manufacturing areas - high efficiency improves products and reduces cost. Meets the demands of off-road. All valves are backed by an established record of performance and reliability in competition that is unapproachable. Titanium construction. Sold individually.