Supertech dual valve spring kits for EJ20/EJ25 Subaru WRX and STi. Includes 16 dual springs, 16 titanium retainers and valve seat locators. There are 4 options for the pressure seat, please do all your research and consult your engine builder if necessary!
Vehicle Fitment:
2002-2014 Subaru WRX
2004-2021 Subaru STi
Purchase Includes:
(16) Dual Valve Springs
(16) Titanium Retainers
(16) Valve Seats
| Part Number: | Pressure Seat: | Details: |
| SPRK-TS1015-SU1 | 70lbs @ 35.50mm | Max Lift: 14.80 Coil Bind: 20.70mm Rate: 12.10mm Retainer: RET-TS60/WRX1 Spring: SPR-TS1015-SUB1 Seat Locator: SEAT-TS/SUB |
| SPRK-TS1015-SU3 | 64lbs @ 36.00mm | Max Lift: 15.30mm Coil Bind: 20.70mm Rate: 12.10mm Retainer: RET-TS60/WRX1 Spring: SPR-TS1015-SU3 Seat Locator: SEAT-TS/SUB3 |
| SPRK-TS1015-SU4 | 82lbs @ 34.25 | Max Lift: 13.50mm Coil Bind: 20.70mm Rate: 12.10mm Retainer: RET-TS60/WRX1 Spring: SPR-TS1015-SUB4 Seat Locator: SEAT-TS/SUB4 |
| SPRK-TS1015/IN-SU4 *Drag Racing ONLY* |
100lbs @ 34.25 | Max Lift: 13.50mm Coil Bind: 20.70mm Rate: 14.90 lbs/mm Retainer: RET-TS60IN2/WRX1 Spring: SPR-TS1015-SUB4 Seat Locator: SEAT-TS/SUB4 |
All Supertech valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance and durability at high RPM. Using high quality steel alloy also provides the added benefit of better structural memory.
Supertech retainers are manufactured with high quality military certified Titanium alloy, and are CNC machined for a tight fit.
Images are for reference.
| Select Pressure Seat: | 70 @ 35.50 (SPRK-TS1015-SU1), 64 @ 36.00 (SPRK-TS1015-SU3), 82 @ 34.25 (SPRK-TS1015-SU4), 100 @ 34.25 (SPRK-TS1015/IN-SU4) |
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Returns
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The policy is 30 days. If it's been longer than 30 days since you bought the item We're sorry to say that we can't offer you a full refund or exchange.
The item cannot be used, and it must be in its original condition. It must also still be in the original package.
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