PAC-1281X-16 Valve Springs, 1200 Series Drag Race, Beehive, Single, 0.551 in. Maximum Valve Lift, 245 lbs./in. Rate, Ford, 5.0L Modular V8, Set of 16

Valve Springs, 1200 Series Drag Race, Beehive, Single, 0.551 in. Maximum Valve Lift, 245 lbs./in. Rate, Ford, 5.0L Modular V8, Set of 16 PAC Racing’s Street Performance RPM Series Beehive Valve Springs are constructed using our signature PACaloy super clean wire and are heat-treated in-house for precision spring rates and improved strength. They also receive a multi-peen process, polishing, and a Nano-Peen™ proprietary surface treatment for service life optimization. Built using our signature PACaloy super clean wire to ensure strength and durability In-house heat-treating for precise spring rates and increased strength Multi-peen process to optimize service life Polishing to improve operating cycles Nano-Peen™ proprietary surface treatment Outer Diameter – Outer Valve Spring Top 0.849 IN / Bottom 1.031 IN Inner Diameter – Outer Valve Spring Top 0.527 IN / Bottom 0.709 IN Installed Height 1.811 IN Installed Load 80 PS Open Height 1.260 IN Open Load 214 PS Open Load / Height (Valve Open) 214 LB @ 1.260 IN Valve Spring Rate 245 PS Max Coil Bind 1.208 IN Max Valve Lift 0.551 IN Recommended Valve Spring Retainer – 300 Series R364 Recommended Valve Spring Retainer – 400 Series R464 Valve Spring Series RPM Series Valve Spring Type Ovate Wire Beehive Primary Market Street Performance