SKU: 5256
GSC Subaru FA20 WRX/BRZ/FRS/86 Dual Cylindrical Valve Spring Kit 2013-2022
GSC Power-Division Dual Cylindrical Valve Spring Kit delivers precise valvetrain control for Subaru FA20 engines in WRX 2015-2021 BRZ 2013-2021 Scion FRS 2013-2016 and Toyota 86/GR86 2017-2022. These springs maintain stability at 10000+ RPM to eliminate valve float during high boost and aggressive driving. Paired with lightweight titanium retainers this kit supports larger cams for increased power output.
Key Features
- Dual Cylindrical Design: Provides bind-free motion and consistent spring rates for smooth valve operation across full lift range
- Spring Pressures: 117 lbs at seat 1.717in 289 lbs open at 1.150in 0.567in lift with 172 lbs/in rate
- Titanium Retainers: 10-degree lightweight retainers reduce valvetrain inertia for quicker response and higher revs
- High RPM Rating: Engineered for 10000+ RPM capability in tuned FA20 setups
- Complete Kit: Includes 16 springs and 16 retainers for direct bolt-on installation
Product Notes
- Check intake and exhaust valve stem heights after installation to confirm proper geometry
- Compatible with cams up to 12.0mm 0.472in lift
- Black oxide coating resists corrosion for long-term durability
Installation Notes
- Professional installation recommended.
- Measure coil bind clearance and installed heights during assembly
- Requires 10-degree valve locks compatible with stock Subaru valves
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | All |
| 2013-2021 | Subaru | BRZ | All |
| 2013-2016 | Scion | FR-S | All |
| 2017-2021 | Toyota | 86 | All |
| 2022+ | Toyota | GR86 | All |
Why Choose GSC?
- Proven in drag racing and endurance events worldwide
- Precision machined chromoly steel construction
- Lifetime warranty on springs against failure
Frequently Asked Questions
- Q: Does this fit Subaru WRX STI models?
A: No this kit fits only FA20F/FH/D engines in WRX BRZ FRS 86 GR86 STI uses EJ257 engine - Q: What materials are used in construction?
A: High-tensile chrome silicon steel springs with titanium 10-degree retainers and black oxide finish - Q: What warranty is provided?
A: Lifetime warranty covers spring breakage under normal use contact GSC for details
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Foam-filled box 9 x 6 x 4 inches
- Weight: 2.1 lbs
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