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SKU: B2281-50
GSC P-D 2015+ Subaru WRX FA20F Exhaust Valve - 29mm Head (STD) - Set of 50
GSC Power-Division exhaust valves deliver direct replacement performance for 2015-2021 Subaru WRX models with the FA20F 2.0L turbo engine. Forged from Inconel these 29mm head valves resist extreme exhaust temperatures and support boosted setups up to 1200 horsepower. The set of 50 provides bulk supply for engine builders tackling multiple builds.
Key Features
- Inconel Construction: One-piece forged Inconel withstands over 1600°F exhaust gas temperatures for long-term durability in high-boost applications
- 29mm Head Diameter: Precise sizing matches OEM specs while improving exhaust flow and scavenging efficiency for better top-end power
- 5.5mm Standard Stem: Exact OEM stem diameter ensures drop-in compatibility without cylinder head modifications
- Swirl Polished Finish: Micro-polished stems and seats reduce friction and wear promoting smoother operation and extended valve life
- Bridge Keeper Groove: Integrated groove securely retains keepers preventing valve train failures under high RPM conditions
Product Notes
- Valves measure 4.331 inches overall length for precise fit in FA20F heads
- Inspect valve seats and guides before installation to ensure proper sealing
- Set of 50 valves weighs approximately 4.5 lbs total shipped in protective packaging
Installation Notes
- Professional installation recommended.
- Requires valve spring removal tool and micrometer for stem clearance checks
- Compatible with stock or aftermarket keepers and seals no special hardware needed
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2017 | Subaru | WRX | Base |
| 2015-2017 | Subaru | WRX | Limited |
| 2015-2017 | Subaru | WRX | Premium |
| 2018-2021 | Subaru | WRX | Base |
| 2018-2021 | Subaru | WRX | Limited |
| 2018-2021 | Subaru | WRX | Premium |
Why Choose GSC?
- Proven in World Rally Championship and drag racing Subaru builds
- Engineered in USA with rigorous dyno testing for real-world reliability
- Consistent valve-to-valve tolerances under 0.001 inches for flawless seating
Frequently Asked Questions
-
Q: Will these valves fit 2015-2021 Subaru WRX FA20F engines only?
A: Yes designed specifically for FA20F cylinder heads in 2015-2021 WRX models not compatible with EJ or FA24 engines -
Q: What material are these valves made from?
A: One-piece forged Inconel 751 alloy chosen for superior heat corrosion and fatigue resistance in turbocharged applications -
Q: Is a warranty included and what about installation?
A: GSC offers a one-year unlimited mileage warranty with professional installation proof machine shop install strongly advised
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Securely packed in foam-lined manufacturer's box dimensions 12 x 8 x 4 inches
- Weight: 4.5 lbs
GSC Power Division
GSC Power Division is a manufacturer of precision-engineered camshafts, valve springs, and valvetrain components designed for high-performance and competition engines across domestic, import, and diesel platforms. Founded by engineers with deep roots in motorsport, GSC Power Division components are machined to exacting tolerances and heat-treated to survive the demands of forced induction and high-rpm applications that destroy stock valvetrain parts. The brand is particularly well-known in the Mitsubishi Evo, Subaru STI, Nissan RB, and Toyota 2JZ communities where aggressive camshaft profiles are essential for extracting maximum power from turbocharged four-cylinder and six-cylinder engines. Whether building for drag racing, road course competition, or a high-powered street car, GSC Power Division camshafts and valve springs are a proven upgrade path. Popular Upgrades GSC Power Division S1, S2, and S3 camshafts are the most popular selections, with each profile offering progressivel...
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