GSC +0.003" Exhaust Valve Guide for Porsche 996 / 997 Turbo 911 – GSC3057.003-1
The GSC3057.003-1 Oversized Exhaust Valve Guide is engineered for Porsche 996 and 997 Turbo 911 engines requiring a +0.003" fitment. Manufactured by GSC Power Division, this guide offers precision sizing and long-term durability for high-performance valvetrain applications.
Fitment and Sizing Options
- Standard size available individually or in sets of 12
- Oversized variants sold individually in +0.001" and +0.003" options
Technical Specs – GSC3057
| Specification | Inches | Millimeters |
|---|---|---|
| Total Length | 1.690" | 42.93mm |
| Outer Diameter | 0.4157" | 10.56mm |
| Valve Stem Diameter | — | 6mm |
Ideal for Porsche Turbo builds requiring oversized valve guides, GSC’s +0.003" option delivers precision fit and performance reliability.
Fitment:
- 2001 Porsche 911 Turbo (996)
- 2002 Porsche 911 Turbo (996)
- 2003 Porsche 911 Turbo (996)
- 2004 Porsche 911 Turbo (996)
- 2005 Porsche 911 Turbo (996)
- 2006 Porsche 911 Turbo (997)
- 2007 Porsche 911 Turbo (997)
- 2008 Porsche 911 Turbo (997)
- 2009 Porsche 911 Turbo (997)
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