If you are running super aggressive camshafts that have high lift; you will require these special valve springs to provide the clearance needed. We made sure to cover all possible aspects for reliability and all conditions for any racing and street use. Tomei valve springs are constructed of a high tensile wire rod in the shape of an oval instead of the traditional circle. The result is a strong stiffer spring that compresses in to a lower profile in order to provide adequate clearance.

Specification:

Diameter: 3.40 x 4.25.
Set length: 35.0mm.
Lift length: 23.0mm.
Supported lift: 12.00.
Set load: 27.0±7% (kgf).
Lift load: 85.0±7% (kgf).
Rev limit: 8500 (Ref).
Material: NHK507.
Process: Nitride.
Colour ID: L Blue.

For Evo Model X.

Stock images used. Actual product may vary.