Manley 11377-1 Sport Compact Race Series Stainless Steel Engine Valve

The Manley 11377-1 Sport Compact Race Series Valve is a premium stainless steel engine valve engineered for high-performance applications. Built using Manley's proprietary Race Series alloy, these valves are manufactured to exacting tolerances and are designed to outflow and outperform standard valves even under the most demanding conditions.

Key Features:

• Race Series Stainless Steel Alloy – Offers superior strength, heat resistance, and durability over conventional valve materials
• Chrome-Plated Stems – Durable, corrosion-resistant finish that reduces friction and wear
• Swirl-Polished Under-Heads – Improves airflow characteristics for enhanced engine breathing
• Fully Hardened Tips – Provides long-term durability under high-cycle rocker arm contact
• Completely Machined Combustion Faces – Ensures a precision seal and optimal heat transfer to the seat
• Closely Controlled Margin Heights – Maintains consistent valve geometry for repeatable performance
• Exact Stem-to-Seat Concentricity – Delivers a finished product with tight tolerances for reliable sealing
• Pro-Flo Intake Design – Reduces stem diameter in the fillet area to increase airflow while simultaneously reducing valve weight
• Extreme Duty Exhaust Option (select applications) – Manley's Extremealloy material delivers greater hot hardness and elevated high-temperature strength, ideal for heavily boosted engines with extreme exhaust gas temperatures

Manley Sport Compact Race Series valves are versatile enough for a wide range of builds — from mild street performance engines to 1,000+ horsepower race cars competing at the drag strip or drifting events. Whether you're building a daily driver with a performance edge or an all-out competition machine, these valves provide the precision engineering and materials needed to go the distance.