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SKU: B2014-50
GSC Power-Division Subaru EJ205 EJ207 EJ257 Chrome Polished Intake Valve 37mm Head +1mm Set of 50 2002-2021 WRX STI
Equip your Subaru with GSC Power-Division chrome polished intake valves featuring 37mm heads and +1mm length designed for EJ205 EJ207 EJ257 engines. This set of 50 delivers reliable performance for high-boost turbo setups in 2002-2021 Impreza WRX and STI models. Enhanced valve flow and wear resistance support aggressive cam profiles and increased horsepower.
Key Features
- 37mm Head Diameter: Larger head size improves intake airflow for greater cylinder filling and power output across the RPM range
- Chrome Polished Stems: Hard chrome finish reduces valve guide wear extends seal life and maintains precise tolerances under extreme heat and boost
- +1mm Stem Length: Exact fit ensures proper valve timing and clearance with stock or aftermarket heads and cams
- Forged 21-4N Stainless Steel: High-strength one-piece construction withstands high RPM and boost levels without fatigue or failure
- Swirl Polished Dished Head: Optimized surface reduces turbulence promotes smoother flow and supports high-lift camshafts
Product Notes
- Ideal for bulk engine builds or race teams needing multiple sets for Subaru EJ turbo applications
- Pair with GSC exhaust valves springs and retainers for complete valvetrain upgrade
- Store in dry environment to preserve chrome finish prior to installation
Installation Notes
- Professional installation recommended.
- Inspect valve guides and seats for wear resize if needed before install
- Compatible with OEM or aftermarket valve springs no special hardware required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza | WRX STI |
| 1999-2007 | Subaru | Impreza WRX STI | JDM |
Why Choose GSC Power-Division?
- Proven in professional racing with championship-winning Subaru teams worldwide
- Made in USA with tight tolerances for consistent performance
- Engineered for direct replacement with gains in durability and flow
Frequently Asked Questions
-
Q: Will these fit my 2006 USDM STI EJ257?
A: Yes direct fit for all 2004-2021 Impreza WRX STI EJ257 engines no modifications needed -
Q: What material are the stems and heads?
A: Forged 21-4N stainless steel construction with hard chrome polished stems for superior heat resistance and guide protection -
Q: Do these require special valve lash settings?
A: Use standard Subaru EJ intake lash specs 0.008-0.010 inch or match your camshaft requirements
Shipping & Handling
- Method: Standard ground shipping
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed to prevent damage
- Weight: 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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