PAC Beehive Valve Springs, Hyd Roller PAC-1219X

SPECIFICATIONS Part# PAC-1219X Name PAC-1219X RPM Series HP Ovate Wire Beehive OD Large End 1.307 ID Large End 0.885 ID Small End 0.650 Install Height 1.800 Load at Installed Height 145 Spring Open Height 1.175 Spring Open Load 358 Recommended Valve Lift 0.625 Spring Rate (lbs/in) 340.000 Mass (grams) 66.60 Coil Bind (max) 1.100 Recommended retainer- CCA-795-16 Recommended locator- CCA-4705-16 "Reduced mass at the top of the spring and from the smaller retainer. Reduced seat pressures, increased lobe acceleration rate, extended rpm range, and enhanced valvetrain stability, among other improvements."