S&S Cycle High-Lift Valve Spring Kit for 1948-1984 Harley-Davidson Big Twin

S&S Cycle High-Lift Valve Spring Kit for 1948-1984 Harley-Davidson Big Twin

Upgrading valve springs is one of the most critical steps in building a performance Panhead or Shovelhead that can rev cleanly and hold power without valve float. S&S Cycle spring kits are built to the same exacting tolerances that have made S&S the benchmark for American V-twin engine work for over sixty years, and this kit gives builders a reliable foundation for any serious performance build.

Key Features

• .550-inch lift capacity for use with performance camshaft builds on Panhead and Shovelhead engines
• Double spring design (outer and inner) prevents valve float and coil bind at maximum lift
• Includes four outer springs, four inner springs, and four precision-machined high-lift top retainer collars
• Fits 1948-1965 Panhead and 1966-1984 Shovelhead Harley-Davidson Big Twin engines
• Built by S&S Cycle to the same production quality standards as their complete engine kits

Technical Specifications

• Lift Capacity: .550 inch
• Spring Type: Double (outer and inner)
• Includes: 4 outer springs, 4 inner springs, 4 high-lift top retainer collars
• Application: 1948-1984 Harley-Davidson Panhead and Shovelhead Big Twin

Fitment Notes

• Fits 1948-1965 Panhead and 1966-1984 Shovelhead Harley-Davidson Big Twin engines
• Compatible with performance camshafts requiring up to .550-inch valve lift
• Does not include pushrods, rocker arms, or other valve train components
• Review the Fitment tab for complete year and model breakdown