KIBBLEWHITE Valve Guide 20-4329

If you're rebuilding a cylinder head or restoring an engine to factory specifications, valve guide wear is often the silent culprit behind oil consumption, blow-by, and compromised ring seal. The KIBBLEWHITE 20-4329 valve guide delivers precision-machined durability using premium C630 material, engineered to handle modern no-lead fuels while maintaining tight tolerances with any valve-stem material. The tapered nose design minimizes port obstruction while maximizing bearing surface—a critical detail that separates quality rebuilds from mediocre ones.

• C630 precision-machined
• No-lead fuel compatible
• 2.02" overall length
• .560" top diameter
• Tapered nose design
• Improves flow characteristics
• Accepts OEM top hat seals
• Standard .420" seal machined
• Intake or exhaust application
• OEM lower collar compatible
• Chromed stem compatible
• Made in the U.S.A.
• Bolt-on installation