Price is for a complete set of 24.

Ferrea Valve Springs are developed from high strength alloys, including premium grade chrome silicone steel. These springs are manufactured with state-of-the-art equipment. These springs are heat-treated and stress-relieved, which dramatically increases the spring's life. Strict quality control procedures and cycle testing ensures consistency from batch to batch. Ferrea valve springs provide the stability needed for high lift, high RPM racing engines, while minimizing the load loss for today's aggressive valve-train combinations.

Good for 11,000 RPM's according to Ferrea, but we've never tested it nor heard of it being accomplished. These springs require Ferrea Titanium Retainers and Ferrea Spring Seat Locators.

The price is for 24 Dual Valve Springs but does not include the retainers or locators.