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SKU: B3026
GSC P-D Subaru EJ205/EJ207/EJ257 Manganese Bronze Intake Valve Guide Stopper Style - Set of 240
Upgrade your Subaru EJ205 EJ207 or EJ257 engine with GSC Power-Division manganese bronze intake valve guide stoppers. These guides fit 2002-2021 Impreza WRX and STI models for reliable valve stem sealing during high-RPM and boosted operation. The stopper style design delivers consistent guide height and extended service life in demanding turbocharged applications.
Key Features
- Manganese Bronze Material: Provides strong wear resistance and efficient heat transfer to maintain valve train stability under extreme conditions
- Stopper Style Design: Locks guides securely in cylinder heads to prevent movement and ensure accurate valve sealing
- Precision Machined Tolerances: Matches OEM specs for EJ205 EJ207 EJ257 intake ports with drop-in compatibility for rebuilt heads
- Set of 240 Pieces: Bulk quantity supports multiple engine builds shop service or racing team maintenance needs
- High-Performance Focus: Handles increased boost pressures and valve speeds beyond stock capabilities without premature wear
Product Notes
- Intended for intake side only on specified EJ series cylinder heads
- Inspect head guide bores for proper sizing before installation
- Packaged securely to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Press-fit installation requires valve guide driver tool and bench press for even force
- Compatible with stock aluminum heads and aftermarket ported heads
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza | WRX STI |
| 1997-2007 | Subaru | Impreza | WRX STI (JDM) |
| 2008-2014 | Subaru | Legacy | 2.5 GT |
| 2008-2013 | Subaru | Forester | XT |
Why Choose GSC Power-Division?
- Engineered for motorsport applications with real-world track testing
- Manufactured to tight tolerances using premium alloys
- Backed by racers in drag road race and rally Subaru programs
Frequently Asked Questions
-
Q: Which Subaru engines are compatible with these valve guides?
A: Designed specifically for intake positions in EJ205 EJ207 and EJ257 turbocharged cylinder heads found in WRX and STI models -
Q: What material are these valve guides made from?
A: Manganese bronze offers high strength corrosion resistance and thermal properties ideal for performance valvetrains -
Q: Is professional installation required?
A: Yes due to precise press-fit process use a dedicated guide installer to avoid damaging the head bore or guide
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box measuring 10 x 8 x 6 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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