Manley 11129-8 Sport Compact Race Series Stainless Steel Performance Valves

The Manley 11129-8 Race Series valve is engineered for high-performance sport compact engines, utilizing premium stainless steel alloy designed to withstand extreme racing conditions. Built to Manley's exacting quality standards, these valves deliver superior flow characteristics and durability for both street and competition applications.

Premium Construction Features:

• Race Series stainless steel alloy for maximum strength and heat resistance
• Chrome-plated stems for reduced friction and extended valve guide life
• Swirl-polished under heads to optimize airflow and combustion efficiency
• Fully hardened tips to prevent wear from aggressive valve train components
• Precision-machined combustion faces for consistent sealing
• Controlled margin heights engineered for optimal heat dissipation
• Exact stem-to-seat concentricity for superior sealing and longevity

Performance Design:

• Pro-Flo design reduces stem diameter in fillet area for increased airflow
• Reduced weight design improves valve train dynamics and high-RPM performance
• Suitable for turbocharged and naturally aspirated applications

Manley Race Series valves are proven in applications ranging from street performance builds to professional race engines producing over 1,000 horsepower. Whether you're building a daily driver with added performance or a dedicated drag racing or drifting machine, these valves provide the reliability and flow characteristics demanded by serious engine builders.