Supertech Dual Valve Spring (Drag Racing) Subaru EJ20 / EJ25 Turbo WRX / WRX STI

$40.00
SKU: SPR-TS1015-IN-SU4
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Supertech dual valve spring, single (product illustration) - Supertech
Supertech Dual Valve Spring (Drag Racing) $40.00

Supertech Dual Valve Spring (Drag Racing) - Subaru EJ20 / EJ25 Turbo - WRX / WRX STI

Supertech dual valve spring for the turbocharged EJ20 and EJ25 DOHC engines in the Subaru WRX and WRX STI, Forester GT / XT and Liberty GT. The inner and outer springs work together for more seat and open pressure than the factory spring. Supertech rates this spring for drag racing. Use it as a replacement in a Supertech kit or to build your own spring setup with the retainers and seat locators to suit.

Note: Not for the 2015-on WRX (VA), which has the FA20 engine. Pressures are Supertech's figures at the installed height shown. Installation by a professional engine builder is recommended.

Features

  • Seat pressure 100 lb @ 33.8mm
  • Open pressure 273 lb @ 11.5mm
  • Max valve lift 13.50mm
  • Coil bind 20.70mm
  • Spring rate 14.9 lb/mm
  • Sold as a single spring

Pairs Well With

Shop more: Supertech

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