GSC +.003" Exhaust Valve Guide w/ Stopper Subaru EJ20 / EJ25 (GSC3025.003.1)
Oversized Exhaust Valve Guide for EJ-Series Subaru Engines
The GSC Power-Division +.003" Exhaust Valve Guide is built for Subaru EJ20 and EJ25 engines, including EJ205, EJ207, EJ255, EJ257, and EJ257B configurations. This stopper-style guide offers a +.003" oversize for cylinder heads that require a tighter fit due to wear or machining, ensuring reliable valve control under high-performance conditions.
Sold Individually
Each guide is sold as a single unit. Standard size guides are available individually or in sets of 8. Oversized options include +.001" and +.003" for precision head work.
Technical Specifications
- Part Number: GSC3025.003.1
- Total Length: 1.873" / 47.57mm
- Outer Diameter: 0.4357" / 11.07mm
- Valve Stem Diameter: 6mm
Fitment Note
Application: Compatible with Subaru EJ20 and EJ25 series engines. Designed for use where +.003" oversized guides are required. Confirm fitment before ordering.
Fitment:
- 2002 Subaru WRX EJ205
- 2003 Subaru WRX EJ205
- 2004 Subaru WRX EJ205
- 2005 Subaru WRX EJ205
- 2006 Subaru WRX EJ255
- 2007 Subaru WRX EJ255
- 2008 Subaru WRX EJ255
- 2009 Subaru WRX EJ255
- 2010 Subaru WRX EJ255
- 2011 Subaru WRX EJ255
- 2012 Subaru WRX EJ255
- 2013 Subaru WRX EJ255
- 2014 Subaru WRX EJ255
- 2004 Subaru WRX STI EJ257
- 2005 Subaru WRX STI EJ257
- 2006 Subaru WRX STI EJ257
- 2007 Subaru WRX STI EJ257
- 2008 Subaru WRX STI EJ257
- 2009 Subaru WRX STI EJ257
- 2010 Subaru WRX STI EJ257
- 2011 Subaru WRX STI EJ257
- 2012 Subaru WRX STI EJ257
- 2013 Subaru WRX STI EJ257
- 2014 Subaru WRX STI EJ257
- 2015 Subaru WRX STI EJ257
- 2016 Subaru WRX STI EJ257
- 2017 Subaru WRX STI EJ257
- 2018 Subaru WRX STI EJ257
- 2019 Subaru WRX STI EJ257
- 2020 Subaru WRX STI EJ257
- 2021 Subaru WRX STI EJ257
- 2022 Subaru WRX STI EJ257
- 2023 Subaru WRX STI EJ257
- 2024 Subaru WRX STI EJ257
- 2025 Subaru WRX STI EJ257B
- 2004 Subaru Forester XT EJ255
- 2005 Subaru Forester XT EJ255
- 2006 Subaru Forester XT EJ255
- 2007 Subaru Forester XT EJ255
- 2008 Subaru Forester XT EJ255
- 2009 Subaru Forester XT EJ255
- 2010 Subaru Forester XT EJ255
- 2011 Subaru Forester XT EJ255
- 2012 Subaru Forester XT EJ255
- 2013 Subaru Forester XT EJ255
- 2005 Subaru Legacy GT EJ255
- 2006 Subaru Legacy GT EJ255
- 2007 Subaru Legacy GT EJ255
- 2008 Subaru Legacy GT EJ255
- 2009 Subaru Legacy GT EJ255
- 2010 Subaru Legacy GT EJ255
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