Manley 11617-8 Stainless Steel Performance Intake Valve - 31mm

The Manley 11617-8 is a high-performance stainless steel intake valve engineered for demanding automotive applications. Featuring a 31mm head diameter and .2740" stem diameter, this valve delivers exceptional flow characteristics and durability for modified engines.

Key Specifications:

• Head diameter: 31mm
• Stem diameter: .2740"
• Overall length: 4.587"
• Tip length: .425"
• Underhead angle/radius: 15° x 1/2"
• Margin: .050"
• Seat width: .080"
• Weight: 55 grams
• Installed height: Stock

Premium Construction Features:

• Race Series stainless steel alloy for maximum strength and heat resistance
• Chrome-plated stem for reduced friction and extended wear life
• Swirl-polished underhead for improved combustion chamber flow
• Fully hardened valve tip for durability with aggressive cam profiles
• Machined combustion face ensures precise sealing
• Pro-Flo design with reduced stem diameter in fillet area for enhanced airflow and reduced reciprocating weight
• 9° dish top for optimized valve pocket clearance

Manufactured to exacting tolerances with precise stem-to-seat concentricity, Manley valves deliver superior performance across all applications from street performance builds to race engines producing over 1000 horsepower. Each valve undergoes rigorous quality control to ensure consistent flow characteristics and long-term reliability in high-RPM, high-boost environments.