KIBBLEWHITE Exhaust Valve Guide 40-0483

Valve guide wear is one of the quickest ways to lose compression, increase oil consumption, and compromise engine reliability. The KIBBLEWHITE 40-0483 exhaust valve guide is precision-machined to OEM specifications from C630 material, ensuring superior durability and consistent performance across extended operating cycles. With its tapered nose design and optimized bearing surface, this guide maximizes flow efficiency while minimizing port restriction—critical factors for any engine builder serious about extracting every available horsepower.

Whether you're rebuilding a street engine or prepping a race motor, this guide accepts standard valve-stem materials and integrates seamlessly with OEM-style top hat seals and lower collars. Made in the U.S.A., it's the kind of precision component that separates a properly engineered build from a mediocre one.

• Material: C630 billet
• Overall length: 2.40"
• Top diameter: .560"
• Seal compatibility: OEM-style top hat
• Seal size: Standard .420"
• Design: Tapered nose
• Fuel compatibility: No-lead compatible
• Valve stem: Any material compatible
• Lower collar: OEM-style compatible
• Application: Intake or exhaust
• Installation: Drop-in design
• Manufactured: U.S.A.
• MPN: 40-0483