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SKU: 3025
GSC P-D Subaru EJ205 EJ207 EJ257 Manganese Bronze Exhaust Valve Guide Stopper Style - Single 2002-2021 Impreza WRX STI
This GSC Power-Division manganese bronze exhaust valve guide stopper fits Subaru EJ205 EJ207 and EJ257 engines found in WRX and STI models. Designed as a single unit for one exhaust valve position it secures the guide with exact tolerances to handle high heat and boost levels. Ideal for engine rebuilds it prevents guide migration and supports reliable valve train operation under demanding conditions.
Key Features
- Manganese Bronze Material: Provides exceptional wear resistance and thermal conductivity suited for exhaust valve environments in turbocharged Subaru engines
- Stopper Style Design: Locks the valve guide in place reducing movement and extending component life during high RPM operation
- Precision CNC Machined: Matches OEM specifications for seamless integration with stock or aftermarket cylinder heads and valves
- EJ205 EJ207 EJ257 Compatible: Direct fit for popular Subaru turbo engines in WRX and STI applications from 2002 to 2021
- Single Exhaust Unit: Allows targeted replacement for individual valves simplifying maintenance on performance builds
Product Notes
- Sold as single piece for exhaust position only pair with intake guides for complete set
- Inspect cylinder head during installation for proper guide seating
- Lightweight component ships in protective packaging to prevent damage
Installation Notes
- Professional installation recommended.
- Remove cylinder head and press out old guides before installing new stopper
- Compatible with GSC valves guides and OEM hardware use assembly lube on guide
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza WRX | STI |
| 2005-2007 | Subaru | Impreza WRX | TR |
| 2008-2014 | Subaru | Impreza WRX | STI Hatchback |
| 2015-2021 | Subaru | WRX STI | - |
Why Choose GSC Power-Division?
- Proven in professional racing with Subaru teams worldwide
- High-strength materials tested for extreme boost and heat cycles
- Engineered for direct bolt-on reliability in performance Subaru builds
Frequently Asked Questions
-
Q: Will this fit 2004-2021 Subaru STI models with EJ257 engines?
A: Yes it directly fits all EJ257 exhaust positions in 2004-2021 Impreza WRX STI cylinder heads -
Q: What makes manganese bronze suitable for this valve guide stopper?
A: Manganese bronze offers superior hardness and resistance to exhaust gas corrosion while maintaining tight tolerances under thermal expansion -
Q: Is there a warranty on this GSC part?
A: GSC Power-Division provides a limited lifetime warranty against manufacturing defects when installed by certified technicians
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective padded envelope 4 x 4 x 1 inches
- Weight: 0.06 lbs
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