Kibblewhite 20-2064C Cast Iron Exhaust Valve Guide Oversize - 004in.

The Kibblewhite 20-2064C is a precision-machined cast iron exhaust valve guide engineered as a direct OEM replacement for Harley-Davidson Shovelhead 80-inch engines. Manufactured by Kibblewhite Precision Machining, Inc. (KPMI), this guide is produced from a proprietary cast iron blend formulated to withstand the demanding thermal and mechanical conditions of today's high-performance engines.

KPMI's certified cast iron delivers excellent wear resistance and a superior guide bore finish that minimizes stem wear over the long term. Guide profiles are designed to maintain critical cross-sectional thickness in high-temperature areas while having minimal impact on airflow through the port. High concentricity tolerances are held throughout manufacturing to ensure the best possible geometry between the valve seat and guide is maintained upon installation.

Key Features:

• Proprietary cast iron material blend — superior wear resistance and bore finish
• Oversize O.D. of +0.004 in. for use in worn or previously reamed guide bores
• Precision-machined to tight tolerances for consistent valve-to-guide geometry
• Guide bore finish is easy on valve stems, extending overall valvetrain life
• Guides require machining for valve seal installation
• Sold individually (quantity: 1)
• Type: Exhaust

Specifications:

• Outside Diameter (G): 0.6290 in. (+0.004 in. oversize)
• Inside Diameter (Internal): 0.3745 in.
• Inside Diameter (External): 0.3735 in.
• Dimension A: 0.450 in.
• Dimension B: 0.540 in.
• Dimension C: 0.855 in.
• Dimension D: 1.315 in.
• Dimension E: 0.745 in.
• Material: Cast Iron

Designed and manufactured to meet or exceed OEM specifications, the Kibblewhite 20-2064C is a trusted choice for engine rebuilders restoring classic Harley-Davidson Shovelhead powerplants to factory-correct or better-than-stock performance standards.