GSC +0.003" Intake Valve Guide for Porsche 996 / 997 Turbo 911 – GSC3058.003-1
The GSC3058.003-1 Oversized Intake Valve Guide is engineered for Porsche 996 and 997 Turbo 911 engines requiring a +0.003" fit. Produced by GSC Power Division, this guide delivers precision machining and long-term reliability for high-performance valvetrain applications.
Fitment and Sizing Options
- Standard size – available individually or in sets of 12
- Oversized options – sold individually in +0.001" and +0.003" increments
Technical Specifications – GSC3058
| Specification | Inches | Millimeters |
|---|---|---|
| Total Length | 1.450" | 36.83mm |
| Outer Diameter | 0.4157" | 10.56mm |
| Valve Stem Diameter | — | 6mm |
Perfect for Porsche Turbo builds requiring oversized intake guides, GSC’s +0.003" option ensures tight tolerances and consistent performance under pressure.
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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