GSC Power-Division 3057-12 Exhaust Valve Guides Set for Porsche 996/997 Turbo

Vehicle Fitment

• 1998-2005 Porsche 911 Turbo (996)
• 2006-2012 Porsche 911 Turbo / Turbo S (997)

Features

• Manganese bronze exhaust valve guides for robust heat resistance
• Standard "STD" sizing matches OEM valve stem dimensions
• Stopper-style design for secure guide alignment
• Precision machined for tight tolerances and reliable fitment
• Improves exhaust valve support under high RPM and boost
• Designed for performance and high-stress applications
• Ideal for engine rebuilds, track, or high-boost street builds
• Full set covers all 12 exhaust positions per cylinder head

Specifications

• Part Number: 3057-12
• Material: Manganese bronze for excellent thermal conductivity
• Guide Type: Standard exhaust valve guide set (12 total)
• Total Length: ~1.690" (42.93 mm) typical for 996/997 exhaust guides
• Outer Diameter: ~0.4157" (10.56 mm)
• Valve Stem Fit: ~6 mm standard exhaust valves
• Application: Porsche 996/997 Turbo series engines

Included Components

• 12x Exhaust valve guides (manganese bronze, STD size)

Product Description

The GSC Power-Division 3057-12 Exhaust Valve Guides Set provides a complete OEM-style replacement kit tailored for Porsche 996 and 997 Turbo engines. Machined from manganese bronze, these guides offer improved thermal conductivity and wear resistance compared with cast iron guides - helping maintain exhaust valve stability and reduce premature wear under high heat and performance conditions.

This set of 12 exhaust valve guides is designed for direct press-fit installation into the cylinder head, matching standard Porsche valve stem sizing for reliable operation in both street and racing applications. Whether rebuilding a high-mileage engine or refreshing a performance build, these guides help ensure consistent exhaust valve geometry and durability through extended use. Professional installation with proper tools is recommended for optimal alignment and valve seal performance.