Outer Diameter – Outer Valve Spring: 1.260 IN
Inner Diameter – Outer Valve Spring: 0.860 IN
Inner Diameter – Inner Valve Spring: 0.770 IN
Installed Height: 1.750 IN
Installed Load / Height (Valve Closed): 140 LB @ 1.750 IN
Open Height: 1.200 IN
Open Load: 437 PS
Open Load / Height (Valve Open): 437 LB @ 1.200 IN
Valve Spring Rate: 540 PS
Max Coil Bind: 1.115 IN
Max Valve Lift: 0.550 IN
Recommended Valve Spring Retainer – 300 Series: R349
Recommended Valve Spring Retainer – 600 Series: R649
Valve Spring Series: 1200 Series
Valve Spring Type: Single with Damper
Valve Spring Application: Circle Track
Primary Market: Circle Track|Street Performance