Manley 11618-8 Stainless Steel Performance Intake Valve - 38mm

The Manley 11618-8 is a premium stainless steel performance valve engineered for demanding automotive applications. Featuring a 38mm head diameter and .2750" stem diameter, this valve is precision-manufactured to deliver superior flow characteristics and exceptional durability in high-performance engines.

Key Specifications:

• Head diameter: 38mm for optimized flow
• Stem diameter: .2750" with chrome finish
• Overall length: 5.339"
• Tip length: .620" with fully hardened tip
• Underhead angle/radius: 10 x 3/8"
• Margin: .045" for precise sealing
• Seat width: .080"
• Top of head: 5 dish design
• Weight: 70 grams
• Installed height: Stock specification

Performance Features:

• Constructed from Manley's Race Series stainless steel alloy for maximum strength and heat resistance
• Chrome-plated stem for reduced friction and extended valve guide life
• Swirl-polished underhead surface for improved flow efficiency
• Fully machined combustion face ensuring consistent performance
• Pro-Flo design with reduced stem diameter in fillet area for increased airflow and reduced weight
• Exact stem-to-seat concentricity for optimal sealing

Manley Performance valves represent over 40 years of precision manufacturing expertise. Each valve undergoes rigorous quality control to meet the demands of both street performance builds and professional racing applications exceeding 1000 horsepower. Suitable for naturally aspirated and forced induction engines where valve reliability and flow optimization are critical.