C674 Valve Guide

Kibblewhite C674 Valve Guide is a precision replacement exhaust valve guide made from C674 (manganese) bronze. This material is designed to be easier to ream and delicately finish, helping you complete valvetrain service faster while still achieving accurate, consistent clearances.

If you're rebuilding a cylinder head and want a guide that machines efficiently, this C674 bronze guide can reduce time spent on reaming and honing—using common battery-operated or electric drills—while delivering the exacting KPMI® tolerances you expect. Compared to premium C630 nickel aluminum bronze guides, C674 offers reduced toughness and wear resistance, making it a practical choice when ease of fitment and finishing is the priority.

Key features:

• ✅ C674 manganese bronze for easier reaming and honing
• ✅ Quick machining with standard drill-driven ream/hone tools
• ✅ KPMI® tolerances for precise valvetrain fit and function

Benefits of use:

• 🔹 Saves workshop time during valve guide sizing and finishing
• 🔹 Helps achieve correct valve-to-guide clearance for smooth valvetrain operation
• 🔹 Reliable replacement part for exhaust-side service and rebuilds

Technical specifications:

• 📌 Brand: Kibblewhite
• 📌 Vendor part number: 80-80230
• 📌 Product: Valve Guide
• 📌 Application: Exhaust
• 📌 Material: C674 Bronze
• 📌 Inside diameter (ID): 0.1961"
• 📌 Outside diameter (OD): 0.3957"
• 📌 Size: Standard
• 📌 Units: Each
• 📌 Made in: USA

Why choose this product?

• ⭐ High-quality USA manufacturing with consistent machining standards
• ⭐ Built to KPMI® tolerance expectations for dependable rebuild results
• ⭐ Easier ream-and-hone workflow for efficient engine service