OE Replacement Shovelhead™ 74 1966 to 1977 Valve Spring Kit
- Max Lift: .415"
- Installed Height: 1.375"
- Seat Pressure: 129 lbs.
- Open Pressure: 272 lbs @ .415 Lift
Springs are engineered for each application using proprietary advanced spring design, simulation and analysis software. Engineers pay special attention to cam and spring harmonics, stress, mass and operating rpm. Premium grade, super clean ground chrome silicon wire is x-rayed at regular intervals to check for inclusions, heat treated and shot peed to ensure maximum spring life.
Kits include 4 steel retainers, 4 springs, 4 steel keepers and 4 steel basewashers.