PAC-1392 Small Diameter Endurance Spring

PAC Racing's PAC-1392 valve spring is a great alternative to the costly competitor's equivalent.  Utilizing PAC's superclean PACaloy™ wire, accompanied with PAC's exotic in house heat treating, polishing and Nano-Peening™, these springs are designed to withstand the abuse of high revving high lift Endurance engines. 

Outer Diameter: 1.314"
Seat Pressure: 185 lbs @ 2.060"
Open Pressure: 730 lbs @ 1.260"
Coil Bind: 1.200"
Spring Rate: 681 lbs/in