Offroad Premium C630 Racing Bronze Valve Guide - Guide, Exhaust, Std, Honda

Guide, Exhaust, Std, Honda

• Type: Valve Guide

The Kibblewhite C630 Racing Bronze Valve Guide is a high-performance exhaust guide designed for Honda applications. Precision-machined from C630 nickel bronze, this guide offers superior wear resistance, excellent heat conductivity, and compatibility with unleaded fuel. The material composition-80% copper, 5% nickel, and 10% aluminum-enhances durability, corrosion resistance, and compatibility with aluminum cylinder heads. Its tapered nose design minimizes port obstruction, improving airflow and performance. The guide is engineered for tight concentricity tolerances, ensuring optimal alignment between the valve seat and guide, reducing material removal during valve jobs, and maintaining consistent chamber volumes. A radius at the nose-to-body transition helps prevent galling during installation. This guide supports OEM-style top hat valve seals (sold separately) and lower collars. It has an overall length of 2.40 inches, a top diameter of 0.560 inches, and is machined for a standard 0.420-inch seal. The flange design allows for correct seal-to-retainer clearance with aggressive cams, eliminating the need for repeated measurement during installation. Sold in sets of two, unless otherwise noted.