Kibblewhite Precision C630 Guide, Intake + 0.002

• Type: Valve Guide

The Kibblewhite Precision C630 Intake Valve Guide (+0.002) is engineered for high performance and durability. Its streamlined profile minimizes airflow obstruction while maintaining critical cross-sectional thickness in high-temperature areas. The guide's nose shape can enhance airflow without additional modifications. Designed for easy installation, the guide features a flange that ensures proper seal-to-retainer clearance with aggressive cam setups. For applications where a flange would interfere with factory components, a slight diameter reduction above the purchase area marks the correct protrusion. Tight concentricity tolerances ensure optimal seat and guide alignment, reducing material removal during valve jobs and maintaining consistent chamber volumes. Made from premium C630 racing bronze, this guide contains 80% copper, 10% aluminum, and 5% nickel, offering excellent thermal conductivity, high wear resistance, and superior corrosion protection-critical for modern pump and performance fuels. It allows for tighter valve clearances, improving valve-to-seat sealing and oil control. The aluminum content makes it especially compatible with aluminum cylinder heads, and a radius transition at the nose prevents galling during installation. Each kit includes two valve guides unless otherwise noted.