Manley 11139-1 Race Series Stainless Steel Performance Valve

The Manley 11139-1 Race Series valve is engineered for high-performance applications where durability and flow are critical. Constructed from premium stainless steel alloy, this valve is built to withstand extreme conditions while maximizing airflow efficiency.

Key Features:

• Race Series stainless steel alloy construction for superior strength and heat resistance
• Chrome-plated stem for reduced friction and extended wear life
• Swirl-polished underhead design to optimize flow characteristics
• Fully hardened tip for increased durability with aggressive valve train components
• Precision-machined combustion face for consistent sealing and performance
• Controlled margin height and exact stem-to-seat concentricity for proper valve seating
• Pro-Flo reduced stem diameter in fillet area increases flow while reducing reciprocating weight

Ideal for sport compact engine builds ranging from street performance to high-horsepower racing applications including drag racing, road racing, and drifting. The Race Series alloy provides the hot hardness and high-temperature strength needed for demanding environments including turbocharged and supercharged applications with elevated exhaust gas temperatures.