PAC Racing is the industry leader in Valve Springs for any type of racing application. Proven in hardcore drag racing applications like the NMRA, NHRA and NMCA and more. The PAC line of valve springs include single, dual, triple or drop-in beehive valve springs with supporting products like Ti-64 titanium retainers, valve locks and dampers to handle your high revving big horsepower applications. PAC Racing springs are stocked here at Beefcake Racing as we use them on our supercharger, N/A or turbo Coyote 5.0L builds. Call 1-855-827-7223 for sales or tech.