1.290 Dual Valve Springs - RPM Series (16)

The 1.290 Dual Valve Springs — RPM Series (16) from PAC Racing Springs are designed for serious engine builders who demand precision valve control in high-performance applications. These springs are suitable for high-revving naturally aspirated engines, forced-induction builds, and stroker packages, ensuring optimal performance under extreme conditions.

Engineered with a dual-spring design, these valve springs feature an inner and outer spring that work together to provide superior spring rate progression and damping characteristics. This design minimizes oscillation and harmonics across the RPM range, while the 1.290 outer diameter ensures compatibility with standard cylinder head spring pockets. The configuration also reduces the risk of coil bind and extends service life during sustained high-load conditions.

Professional engine builders, bracket racers, and street performance enthusiasts will find these springs ideal for applications requiring tight valve timing control. They are particularly beneficial when factory springs are inadequate for modified camshaft profiles and elevated RPM limits, making them a reliable choice for enhancing engine performance.