PAC Racing Springs PAC-1201X-1 - Circle Track 1200 Series Valve Spring RPM Series Premium Version of the PAC-1201

Part#: PAC-1201X Name: PAC-1201X RPM Series Circle Track Single w/Damper SKU: PAC-1201X Alt Part#: PAC-1201X-16 Description: Circle Track 1200 Series Valve Spring RPM Series Premium Version of the PAC-1201 Outside Diameter: 1.260 Outer Spring ID: 0.860 Middle Spring ID: N/A Damper: Yes Inner Spring ID: 0.770 Install Height: 1.750 Load at Installed Height: 150 Spring Open Height: 1.200 Spring Open Load: 460 Recommended Valve Lift: 0.550 Spring Rate (lbs/in): 540 Coil Bind (max): 1.115