SKU: 3058-12
GSC Power-Division Manganese Bronze STD Intake Valve Guides – Set of 12 for Porsche 996/997 Turbo
The GSC 3058-12 Manganese Bronze STD Style Intake Valve Guides are a high-performance upgrade for the Porsche 996 and 997 Turbo (3.6L and 3.8L) engines. Manufactured from premium manganese bronze alloy, these guides offer superior heat dissipation, reduced wear, and better valve stem lubrication compared to stock cast iron guides. The standard (STD) size ensures direct drop-in replacement with no machining required. Sold as a complete set of 12 guides to fully service both cylinder heads. Ideal for high-boost turbo builds, track cars, or anyone seeking maximum reliability and longevity from their 996/997 Turbo engine.
Key Features
- Manganese Bronze Alloy: Superior heat transfer and wear resistance
- STD Size: Direct drop-in replacement no machining required
- Precision Machined: Exact tolerances for perfect valve stem fit
- Set of 12 Guides: Complete service for both cylinder heads
- High-Performance Design: Handles extreme turbo temperatures and boost
- Improved Lubrication: Reduces valve stem friction and oil consumption
Specifications
| Specification | Detail |
|---|---|
| Part Number | 3058-12 |
| Brand | GSC Power-Division |
| Material | Manganese Bronze |
| Style | STD (Standard Size) |
| Position | Intake |
| Quantity | Set of 12 Guides |
| Application | Porsche 996/997 Turbo (3.6L / 3.8L) |
| Country of Origin | United States |
| Warranty | Limited Lifetime (GSC Power-Division) |
| Shipping Weight | Approx. 1 to 2 lbs |
Whats Included
- 12x GSC Manganese Bronze STD Intake Valve Guides
Product Notes
- Direct replacement for factory intake valve guides on 996/997 Turbo engines
- Manganese bronze provides better thermal conductivity than stock cast iron
- Ideal for high-boost, high-RPM turbo applications
- Pair with GSC valve springs, retainers, and titanium valves for complete valvetrain upgrade
Installation Notes
- Estimated time: 4 to 8 hours (head removal required)
- Professional cylinder head work recommended
- Guides must be installed with proper interference fit and honed to valve stem clearance
- Valve job and head resurfacing recommended during installation
This Part Fits
| Year | Make | Model | Engine |
|---|---|---|---|
| 2001-2005 | Porsche | 996 Turbo | 3.6L Twin-Turbo |
| 2006-2012 | Porsche | 997 Turbo / Turbo S | 3.6L / 3.8L Twin-Turbo |
Why Choose GSC Power-Division Valve Guides?
- Premium manganese bronze for maximum heat dissipation and durability
- Engineered specifically for high-performance Porsche Turbo applications
- Complete set of 12 for full head service
- GSC quality trusted by professional engine builders
Frequently Asked Questions
- Q: Are these intake or exhaust guides?
A: These are intake valve guides only (set of 12). Exhaust guides are available separately. - Q: Do I need to hone the guides after installation?
A: Yes, professional installation with proper valve guide honing to achieve correct stem-to-guide clearance is required. - Q: What is the warranty?
A: Covered by GSC Power-Division limited lifetime warranty.
Shipping and Handling
- Method: UPS / FedEx Ground
- Availability: In stock ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 1 to 2 lbs
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