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Supertech Dual Valve Spring Kit – EJ25 Non Turbo DOHC / SOHC

Supertech Dual Valve Spring Kit – EJ25 Non Turbo DOHC / SOHC


All Supertech valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms. Using high quality steel alloy allso provides the added benefit of better structural memory for all of our springs.


In stock


SKU: SPRK-TS1015-SU5 Category: Tag:


Supertech valve springs are computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue. They also utalize computer software that allows us to ensure that the harmonics are under control. This combined with our high quality steel alloy enables Supertech valve springs to be more durable in extreme conditions, giving your performance racing engine a serious competitive advantage in both perforamnce and durablity.

Supertech retainers are manufactured with high quality military certified Titanium alloy, and are CNC machined for a tight fit. Our high quality retainers are among the best in the industry.

Quick Specs

  • Seat Pressure: 70 @ 35.5
  • Open Pressure: 209 @ 11.5
  • Max Lift: 13.80mm
  • Coil Bind: 20.70mm
  • Rate: 12.1
  • Kit spring: SPRK-TS1015
  • Kit spring qty: 16
  • Retainer: RET-TS60/WRX1
  • Retainer qty: 16
  • Seat Locator: SEAT-TS/SUB-5
  • InnSpr.ID: 15.20mm
  • InnSpr.OD: 20.00mm
  • OutSpr.OD: 27.50mm
  • OutSpr.ID: 20.00mm
  • Seat Locator qty: 16


Additional Information

Weight 3 lbs
Dimensions 9.6 × 6.5 × 2.5 in


  • Subaru – EJ25 Non Turbo DOHC
  • Subaru – EJ25 Non Turbo SOHC