Crower 68153-1 Features:

Crower 68153-1 dual valve spring for GM LS1 applications 1.300 in. outside diameter dual spring design for high-lift camshaft setups Supports required spring pressure for reliable valve control at high rpm Optimized wire diameter, material, and coil count help reduce valve float

Valve Springs 1.300 Dual For LS1, 1.300 In. Od, Features:

• 1.300 in. OD dual spring for GM LS1, high-lift cam support, stable valve control and improved valvetrain stability at elevated rpm
• Optimized wire diameter and coil count, reduced valve float risk, consistent valvetrain motion and spring behavior under load
• Dual-spring design helps maintain lifter-to-cam contact, supports reliable high-rev operation and precise timing accuracy
• Engineered to resist coil bind, protects valvetrain components during aggressive cam profiles and sustained high-rpm use
• Single spring for custom builds or replacements, performance-focused LS1 fitment for targeted valvetrain service needs