Designed with the capability to be used in applications from stock rebuilds, to all out purpose built race trucks.

With higher boost capability, improved spring shape and increased rpm capability which allows for maximum spring stability at high rpm, while also having a much lower amount of stress that the spring wire will have to live with. This in turn increases service life even in low rpm applications, while having a 6,000 rpm capability.

Increased the valve spring seat pressure to 105 lbs to retain control of the valves to a higher PSI of boost, but will remain safe to run with the factory flat tappets.

Lightweight Billet steel retainers that have been designed to mate perfectly with the conical beehive spring shape. This retainer is much lighter in weight and stronger than OEM and other aftermarket retainers because of its reduction in size.

Also included are valve locks to pair with these new retainers.

Every valve spring is tested in a computerized spring load cell. Each set of springs is matched within 1% of seat pressures to provide just that much more added quality.