Manley 11163-1 Sport Compact Race Series Stainless Steel Engine Valves

Manley Performance's Sport Compact Race Series Valves (PN 11163-1) deliver race-proven performance built with Manley's premium Race Series stainless steel alloy. Engineered and manufactured to exacting tolerances, these valves are designed to outperform the competition across a wide range of applications — from mild street builds to high-output race engines pushing 1,000+ horsepower.

Key Features:

• Race Series Alloy Construction: Premium stainless steel formulation delivers exceptional strength, durability, and heat resistance
• Chrome-Finished Stems: Durable chrome stems reduce wear and improve longevity under high-stress conditions
• Swirl-Polished Under-Heads: Improves airflow dynamics into and out of the combustion chamber
• Fully Hardened Tips: Resist wear from rocker arm or follower contact, extending valve life
• Completely Machined Combustion Faces: Precision-machined for optimal sealing and heat transfer to the seat
• Tightly Controlled Margin Heights: Ensures consistent performance and proper sealing across every valve
• Exact Stem-to-Seat Concentricity: Precision alignment for a superior valve-to-seat seal and leak-free performance
• Pro-Flo Intake Design: Intake valves feature a reduced stem diameter in the fillet area for improved airflow and reduced valve weight
• Extreme Duty Exhaust Option: Select applications use Manley's Extremealloy material, offering superior hot hardness and high-temperature strength — ideal for heavily boosted engines with extreme exhaust gas temperatures

Manley Sport Compact Race Series Valves are a direct upgrade for performance builds in the sport compact segment, equally at home on the street, at the drag strip, or on a drifting course. Whether you're building a spirited daily driver or an all-out competition engine, these valves provide the reliability and performance demanded by serious enthusiasts.