NISSAN VR38DETT. Valve spring and Titanium retainer set for extreme high boost and high rpm drag racing engines. Ovate wire conical spring made with high quality spring steel and the highest level processing treatments for improved fatigue life. Ultra high natural frequency to help control spring surge at high rpm. Designed for the fastest GT-Rs in the world.

Intake: 130lb at 35.5mm (1.398″) installed height. 270lb at 11.0mm valve lift.
Exhaust: 153lb at 33.35mm (1.313″) installed height. 306lb at 11.0mm valve lift.
Coil bind height of spring 21.6mm (.850″).