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Herbert Valve Springs are manufactured from the highest quality materials and are inspected during every step of manufacturing to insure the kind of performance you would expect.

These Titanium Retainers are USA made from premium titanium and BILLET machined 10 degree 5/16" locks.

OD:1.550
ID:.800
Roller Spring
Max Lift: .675
Spring Type: Dual
Seat Pressure: 200/1.850
Open Pressure: 550/1.200
Coil Bind: 1.150