Supertech VW Intake/Exhaust Valve Guide Conversion From 8mm to 7mm Stem - GDE-VW8V-7A

Valve Guides

Supertech valve guides are manufactured from high quality Manganese Bronze for sport compact and domestic applications. Our valve guides are designed to be used in combination with our low friction Black Nitride valves to provide the best solution for both performance and durability.

For exhaust applications in high powered engines that need a better thermal transfer coefficient, we offer copper alloy guides. Copper has about a 3x higher thermal transfer rate than manganese bronze, pulling heat out of the exhaust valve stem more effectively.

Key Features

• High quality Manganese Bronze construction
• Copper alloy exhaust guides for high heat applications
• Approximately 3x higher thermal transfer with copper alloy
• Precision machined for consistent stem clearance
• Designed to pair with Supertech Black Nitride valves
• Standard and oversize OD options for worn guide bores

Applications

For any performance cylinder head rebuild — from street ports to full race heads. Guide installation and final honing should be performed by a qualified machine shop.