Cosworth (2.0L/2.3L) High RPM Valve Spring Set 11.5mm Lift (16)Cosworth (2. 0L 2. 3L) High RPM Valve Spring set 11. 5mm lift (16) High RPM Valve Springs Cosworth High RPM Valve Springs are the result of countless hours of engineering, testing and validation ensuring the best possible spring for high performance applications. Cosworth High RPM Valve Springs are wound from the worlds finest Japanese Kobe steel and feature dual chamfered ends to reduce wear on seats and retainers. Each spring has been engineered