PAC Racing RPM Series Beehive Valve Spring Set 16-pack 1.072-1.307 OD 340 lb/in 0.625 Max Lift 1219X

If you're building or rebuilding a high-performance engine, valve spring selection directly impacts reliability, valve control, and RPM ceiling. The PAC Racing RPM Series Beehive springs deliver the consistent load and precise lift characteristics needed to keep your valvetrain stable under extreme conditions. This 16-piece set is engineered for V8 applications where coil bind safety and durability across a wide RPM range are non-negotiable.

PAC Racing's proprietary heat-treating and multi-peen treatment process ensures these springs handle repeated cycles without fatigue or loss of tension. With a spring rate of 340 lbs/in and carefully calculated coil bind margins, you get predictable valve control from idle to redline—whether you're bracket racing, road racing, or pushing your engine to its limits on the dyno.

• 16-piece set (one V8)
• 340 lbs/in spring rate
• 0.625" maximum valve lift
• 1.800" installed height
• 145 lbs @ installed height
• 1.100" coil bind height
• 358 lbs @ open height
• 1.307" outer diameter
• 0.650" inner diameter
• PAC Racing proprietary heat treatment
• Multi-peen treatment for durability
• Beehive design construction
• MPN: M-6513-1219X