RACING VALVE SPRINGS 930![]() These springs kits are designed specifically for the 911 Turbo (930). This spring is currently being used on racing 930 engines using large valves, turning 8,000 RPM and running 15-30 pounds of boost. These high quality springs are heat treated, shot peened, polished & low temp stress relieved The Spring Kit includes 12 Inner and Outer valve springs, 12 spring cups and 12 Titanium Retainers. |