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SKU: B2011-50
GSC P-D Subaru EJ205/EJ207/EJ257 STD Head Chrome Polished Exhaust Valve - Set of 50 (02-21 WRX/STI)
GSC Power-Division chrome polished exhaust valves provide direct replacement for Subaru EJ205 EJ207 and EJ257 standard head engines found in Impreza WRX and STI models from 2002 to 2021. This set of 50 valves supports high-volume rebuilds or race shop needs with precise sizing for OEM heads. Chrome stems cut friction while forged construction handles turbocharged heat and RPM.
Key Features
- One-Piece Forged Design: Built from 21-4N stainless steel for strength that resists fatigue in boosted applications
- Chrome Polished Stems: 7mm diameter reduces guide wear and friction for longer life under high heat
- Swirl Polished Heads: 36.5mm diameter enhances exhaust flow velocity without altering port design
- Bead Blasted Finish: Promotes even seating and sealing on stock valve seats
- Standard Sizing: Matches OEM specs at 97.75mm overall length for drop-in compatibility
Product Notes
- Sold as set of 50 for bulk engine builds or team use
- Inspect valve guides before install to ensure proper clearance
- Standard ground shipping with protective foam insert packaging
Installation Notes
- Professional installation recommended.
- Perform three-angle valve job for optimal sealing and flow
- Compatible with OEM retainers springs or GSC upgrades
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 |
| 2004-2008 | Subaru | Forester | XT |
| 2005-2009 | Subaru | Legacy | GT |
| 2008-2014 | Subaru | Impreza | WRX Hatchback |
Why Choose GSC Power-Division?
- Proven in SCCA time attack and drag Subaru race cars
- Machined to micron tolerances for repeatable performance
- Backed by real-world testing on 400+ whp builds
Frequently Asked Questions
-
Q: Do these fit 2008-2021 STI models?
A: Yes EJ257 STD head from 2004-2021 STI including hatchback and sedan trims -
Q: What material and stem treatment?
A: Forged 21-4N stainless steel valves with chrome polished stems for heat dissipation and low friction -
Q: What warranty applies?
A: Limited lifetime against manufacturing defects when installed by certified shop
Shipping & Handling
- Method: Standard ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box 12x8x6 inches
- Weight: 6 lbs
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