KIBBLEWHITE Exhaust Valve Guide 20-21030

When you're rebuilding a high-performance engine, valve guides are critical to maintaining proper valve sealing, reducing oil consumption, and ensuring consistent combustion chamber pressures. The KIBBLEWHITE 20-21030 is precision-machined from C630 material and engineered to handle modern no-lead fuels while accepting any valve-stem material—giving you the durability and flexibility needed for serious engine work. Its tapered nose design optimizes flow characteristics while minimizing port obstruction, delivering measurable improvements in cylinder head performance.

Technical Specifications:

• Material: C630 precision-machined
• Overall length: 2.40"
• Top diameter: .560"
• Guide length: 2.02"
• Seal compatibility: OEM-style top hat
• Seal bore: Standard .420"
• Application: Intake or exhaust
• Collar: Accepts OEM lower
• Valve-stem: Any material compatible
• Fuel type: No-lead compatible
• Tapered nose design: Maximum bearing service
• Origin: Made in USA