Howards Cams Pro-Alloy Mechanical Roller Valve Springs
Howards Cams™ Pro-Alloy material is specially developed low stress, high endurance material. Howard's Cams research and development staff spent many years of development, experience and testing to create a spring you can count on. Low fatigue rate compared to most roller springs on the market. Cycle tested to 12 million cycles with no breakage. Each spring is coiled using the most advanced CNC winders in the industry. Each spring is then parallel ground, stress relieved and deburred. These high standards are what it takes for longer spring life even in rough racing environments. Sets of 16.
Part Type: Pro-Alloy Mechanical Roller Valve Springs
Style: Performance Valve Springs
Damper Included: No
Outer Spring Out Side Diameter (O.D.): 1.550"
Outer Spring In Side Diameter (I.D.): 1.143”
Inner Spring Out Side Diameter (O.D.): 1.033”
Inner Spring In Side Diameter (I.D.): .749”
Seat Pressure: 230 @ 1.880"
Open Pressure: 550 @ 1.250"
Valve Spring Rate: 508
Maximum Suggested Lift: .750"
Coil Bind: 1.080"
Electro Polished: No
Suggested Steel Retainers: 97118, 97128
Suggested Titanium Retainers: 97220
Suggested Seat Cups: 96015
Suggested Locators: 96034
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 98643
Packaged Weight: 3.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold in Sets of 16