V-Twin Knucklehead Cast Iron Valve Guide 18185-40 – Intake & Exhaust

Maintain valve alignment and longevity with the V-Twin Cast Iron Valve Guide, designed for Knucklehead engines in Harley-Davidson models from 1936 to 1947. This standard intake/exhaust valve guide accepts valve stem seals and pairs with common components to keep your valve train operating smoothly.

• Material: Cast iron
• Length: approximately 2.08 inches
• Applications: Fits both intake and exhaust; accepts valve stem seals
• Compatibility: Harley-Davidson FL models 1936–1947; EL models 1936–1938
• OEM cross-references: 18185-40 and 167-40
• Recommended pairing: #14-0973 Valve Stem Seal Set
• Origin: Manufactured in Taiwan
• Related hardware: Overhead Valve Guide Gasket (SKU 15-0297), Replica Valve Spring Set (SKU 13-0792), Nitrate Intake/Exhaust Valves (SKUs 11-9641 and 11-9643)

Designed for restoration or repair of classic Knucklehead engines, this valve guide helps maintain consistent valve clearance and stable airflow across the intake and exhaust cycles, supporting reliable performance and smoother operation over time.

Knucklehead standard cast iron valve guide fits intake and exhaust and accepts valve stem seals.

The V-Twin Cast Iron Standard Intake/Exhaust Knucklehead Valve Guide is an essential component designed for classic Harley Davidson models from 1936 to 1947. Crafted from durable cast iron, this valve guide ensures reliable operation and longevity in your engine's intake and exhaust systems. Its precise design and material composition help maintain proper valve alignment and movement, contributing to optimal engine performance. This guide is compatible with a range of vintage Harley Davidson FL and EL models, making it a reliable choice for restoration or repairs.

Measuring approximately 2.08 inches in length, this valve guide is engineered for ease of installation and compatibility with your existing engine components. It is recommended to use this guide in conjunction with the #14-0973 Valve Stem Seal Set for optimal sealing and valve operation. The guide's robust construction ensures consistent valve clearance and reduces wear over time, supporting smooth engine function and power output. Whether you're restoring a vintage motorcycle or replacing worn parts, this guide provides a trusted solution to maintain your Harley Davidson's performance.

As a vital part of your engine's valve train, the V-Twin Cast Iron Valve Guide works seamlessly with accessories such as the Overhead Valve Guide Gasket (SKU 15-0297), Replica Valve Spring Set (SKU 13-0792), and Nitrate Intake and Exhaust Valves (SKU 11-9641 and 11-9643). Its compatibility with OEM cross-references 18185-40 and 167-40 assures quality and fitment for your specific Harley Davidson model. Trust in V-Twin's heritage of quality craftsmanship to keep your vintage motorcycle running smoothly and reliably for years to come.

Features:

• Material: Cast iron for durability and longevity

• Design: Suitable for intake and exhaust applications on vintage Harley Davidson models

• Length: Approximately 2.08 inches for proper fit and function

• Compatibility: Fits Harley Davidson FL models from 1936 to 1947 and EL models from 1936 to 1938

• Recommended Use: Best paired with #14-0973 Valve Stem Seal Set for optimal performance

• Origin: Manufactured in Taiwan to meet quality standards

Fitment:
Harley Davidson EL 1936
Harley Davidson EL 1937
Harley Davidson EL 1938
Harley Davidson EL 1939
Harley Davidson EL 1940
Harley Davidson FL 1941
Harley Davidson FL 1942
Harley Davidson FL 1943
Harley Davidson FL 1944
Harley Davidson FL 1945
Harley Davidson FL 1946
Harley Davidson FL 1947