Supertech Performance GDE-HB55-I Manganese Bronze Intake Valve Guide Stem - 5.5mm

The Supertech Performance GDE-HB55-I is a precision-machined intake valve guide designed for Honda B-Series and H-Series engines. Manufactured from high-quality manganese bronze, this guide delivers superior wear resistance, heat dissipation, and dimensional stability compared to standard cast iron OEM guides — making it an ideal upgrade for performance and high-revving applications.

With a 5.5mm stem bore and an outer diameter of 12.07mm and length of 44.8mm, the GDE-HB55-I is engineered to precise tolerances for a proper press fit and consistent valve alignment. When paired with low-friction nitrated valves, these guides provide optimal sealing, reduced stem wear, and long-term durability under demanding operating conditions.

Key Features:

• Precision-machined from high-quality manganese bronze for excellent wear resistance
• 5.5mm valve stem bore diameter
• Outer diameter: 12.07mm
• Length: 44.8mm
• Intake valve guide application
• Compatible with Supertech and OEM low-friction nitrated valves
• Sold individually — order the quantity equal to your engine's intake valve count

These valve guides are a direct upgrade for builders seeking improved longevity and performance in Honda B-Series and H-Series engine builds. Sold per guide — order the quantity needed for your specific application (e.g., quantity of 8 for a typical 4-cylinder B/H-Series intake replacement set).