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SKU: 2012-8 | UPC: GSC2012-8
GSC P-D Subaru EJ205/EJ207/EJ257 36mm Head (STD) Chrome Polished Intake Valve - Set of 8 for 2002-2021 Impreza WRX STI
These GSC Power-Division intake valves feature a 36mm head diameter and standard 103.45mm length for direct fit in Subaru EJ205 EJ207 EJ257 engines in 2002-2021 Impreza WRX and STI models. Chrome polished stems cut friction for extended life in high boost and RPM conditions while bead blasted heads enhance airflow. This set of 8 valves supports reliable power gains in turbocharged Subaru builds.
Key Features
- 36mm Head Diameter: Larger head design increases intake airflow over stock valves to handle higher horsepower in boosted EJ engines
- Chrome Polished Stem: Polished upper stem reduces guide wear and valve seal drag for reliable sealing and heat dissipation
- One-Piece Forged Construction: Forged from high-strength stainless steel to endure extreme boost pressures and valvetrain demands
- Standard Length (103.45mm): Matches OEM length for drop-in fit without cylinder head modifications
- Bead Blasted Finish: Head treatment boosts flow efficiency and fights carbon buildup in turbo setups
Product Notes
- Inspect cylinder head valve guides and seats for wear prior to installation
- Use high-quality assembly lube on stems during valve installation
- Packaged in foam inserts to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Requires valve spring compressor tool for EJ20 EJ25 heads
- Compatible with stock or aftermarket valve springs and retainers
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2005 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2006 | Subaru | Impreza | WRX TR |
| 2004-2021 | Subaru | Impreza | WRX STI |
| 2008-2014 | Subaru | Impreza | WRX STI Hatchback |
| 2015-2021 | Subaru | WRX STI | Limited |
Why Choose GSC Power-Division?
- Race-proven in WRX STI drag and rally applications worldwide
- Manufactured with tight tolerances for Subaru turbo engines
- Backed by engineering focused on high-RPM valvetrain reliability
Frequently Asked Questions
-
Q: Will these valves fit my 2006 Subaru STI EJ257?
A: Yes these are direct replacement for all EJ257 engines in 2004-2021 STI models with 36mm intake head size -
Q: What material are the valves made from?
A: Forged from premium stainless steel with chrome polished stems for heat resistance and reduced friction -
Q: Do these require special installation tools?
A: Valve spring compressor tool needed for EJ20 EJ25 heads professional installation advised for best results
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective foam-lined box 9 x 6 x 2 inches
- Weight: 1.1 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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