S&S CYCLE Spring Kit - .650" 900-0050

If you're building a high-revving naturally aspirated engine, valve spring performance directly impacts reliability and peak horsepower. The S&S Cycle Spring Kit is engineered to safely support .650" valve lift while maintaining consistent seat pressure across your entire power band. This is the foundation you need to maximize flow without sacrificing durability or risking float at critical rpm ranges.

Designed and manufactured in the U.S.A., this spring kit delivers the precise specifications required for demanding engine builds. Whether you're tuning a street machine or preparing for weekend competition, these springs provide the controlled lift and consistent preload necessary to keep your valvetrain solid.

• Valve lift: .650"
• Installed height: 1.860"
• Installed pressure: 178 lbs.
• Max lift pressure: 376 lbs.
• Maximum rpm: 6500
• Includes springs, collars, keys
• U.S.A. manufactured
• Part number: 900-0050