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SKU: 2282-8
GSC Power-Division 2015-2021 Subaru WRX FA20F 21-4N Stainless Intake Valve - 34mm Head (STD) - SET 8
GSC Power-Division intake valves replace stock components on the 2015-2021 Subaru WRX FA20F engine with a complete set of 8. These 34mm standard head valves use 21-4N stainless material for reliable strength under high RPM and boost. They support performance modifications while maintaining precise engine operation.
Key Features
- 21-4N Stainless Material: Provides high fatigue strength and heat resistance ideal for turbocharged FA20F applications
- 34mm Head Diameter (STD): Matches OEM sizing at 34.00mm head 105.15mm length and 6.98mm stem for direct fit
- Thicker Keeper Groove: Increases durability in the keeper area to handle aggressive valve springs
- Increased Back Relief: Enhances sealing on multi-angle valve seats and improves heat dissipation
- Swirl Polished Finish: Reduces surface friction for smoother airflow and less valve bounce at high lifts
Product Notes
- Pair with upgraded valve springs for high lift camshafts
- Inspect valve guides during replacement for optimal performance
- Ships in protective tube packaging to prevent damage
Installation Notes
- Professional installation recommended.
- Valve lash adjustment required after installation
- Compatible with stock or aftermarket valve retainers and collets
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Base |
| 2015-2021 | Subaru | WRX | Premium |
| 2015-2021 | Subaru | WRX | Limited |
Why Choose GSC Power-Division?
- Engineered for motorsport applications with real-world testing
- Manufactured to tight tolerances for consistent performance
- Backed by decades of experience in Subaru performance parts
Frequently Asked Questions
-
Q: Will these valves fit my 2015-2021 Subaru WRX?
A: Yes they are direct replacements for FA20F engines in Base Premium and Limited trims. Confirm your engine code before purchase. -
Q: What makes 21-4N stainless different?
A: It offers better resistance to heat and wear compared to standard stainless used in OEM valves especially under boost. -
Q: What warranty applies?
A: Covered against manufacturing defects. Contact GSC for claims with proof of proper installation.
Shipping & Handling
- Method: Standard ground
- Availability: In stock - ships same or next business day
- Packaging: Protective tube inside box 10 x 6 x 2 inches
- Weight: 1.25 lbs
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