Includes beehive valve springs, retainers, and locks. Eliminates the heavy factory rotators for lighter, conventional style retainers. Seat pressure: 140lb closed, 280lb full lift.

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