Howards Cams 98635 Max Effort Dual Valve Spring Set 1.557" OD 471 lbs/in

The Howards Cams 98635 is a Max Effort mechanical roller dual valve spring set with damper designed for competition racing applications. These competition racing valve springs are CNC coiled and heat-treated in the finest facilities available, using only the highest quality valve spring wire, and are stress relieved, ground and shot-peened.

Key Specifications:

• Outer spring outside diameter: 1.557 inches
• Outer spring inside diameter: 1.143 inches
• Inner spring inside diameter: 0.749 inches
• Seat pressure: 225 lbs @ 1.950 inches installed height
• Open pressure: 555 lbs @ 1.250 inches
• Spring rate: 471 lbs/in
• Maximum suggested lift: 0.740 inches
• Coil bind: 1.150 inches

This set includes 16 valve springs and is designed for race applications. Whether you're running a flat tappet or roller cam in your drag race, circle track, road course, performance marine or other extreme race application, Howards offers the perfect valve spring to suit your needs. Suggested retainers include 97118, 97128 (steel) or 97220 (titanium), with seat cups 96010 and locators 96031.