1.490 Dual Valve Springs (16)

The 1.490 Dual Valve Springs (16) from PAC Racing Springs are designed for serious engine builders and performance enthusiasts who require reliable valve control at high RPM. These dual valve springs are essential for high-revving street or race engines, ensuring precise timing for valve lift and closure to maintain cylinder head integrity.

Featuring a dual-spring design with inner and outer coils, these valve springs provide superior damping of oscillation and improved stability compared to single springs. The 1.490-inch seat diameter is compatible with modern cylinder head applications, delivering optimized spring rate characteristics for sustained valve actuation without issues like chatter or coil bind.

These valve springs are ideal for builders working on both boosted and naturally aspirated power plants that utilize aggressive cam profiles, roller lifters, or high-lift rocker arms. The set includes 16 springs, sufficient for a complete small-block or select big-block engine, ensuring consistent performance across the entire RPM range.