Supertech Performance GDE-H66-I Manganese Bronze Intake Valve Guide 6.6mm

The Supertech Performance GDE-H66-I is a precision-machined intake valve guide designed for Honda LS-series and H23-series engines. Manufactured from high-quality manganese bronze, these guides deliver exceptional wear resistance, superior thermal conductivity, and long-term durability under demanding performance and racing conditions.

Key Features:

• Material: High-quality manganese bronze for superior strength and heat dissipation
• Valve stem diameter: 6.6mm — precision-matched to OEM and performance intake valves
• Precision-machined to tight tolerances for consistent fit and reliable sealing
• Compatible with Supertech low-friction black nitride valves for optimized performance
• Designed as a direct replacement or performance upgrade over OEM valve guides
• Ideal for naturally aspirated, forced induction, and high-rpm performance builds

Compatibility Note: This guide is designed for Honda LS-series and H23-series engines, including select Acura B18A, B18B, and Honda B20 applications. Always verify fitment against your engine's intake valve stem diameter before ordering.

Sold individually (per valve guide). Order the quantity equal to the number of intake valve guides required by your engine. For example, a 4-cylinder engine with 4 intake valves requires a quantity of 4.