Pro Circuit's Titanium Intake Valves are designed based on our race technology and manufactured to our stringent specifications by Del West, the industry leader in F-1 racing valve technology. Each intake valve is CNC-machined and precision ground using only titanium. Every valve is sprayed with a thermal-nitride coating to increase performance, durability and reduce normal wear. Available for most Honda, Yamaha, Suzuki & Kawasaki models.