Manley 11124-12 Valvetrain Engine Intake Valve

The Manley 11124-12 Race Series stainless steel intake valves are engineered for Sport Compact applications and manufactured to the highest quality standards using Manley's premium Race Series alloy. This set includes 12 intake valves built to deliver superior flow and durability in even the most demanding performance environments.

Key Features:

• Race Series Alloy Construction – Premium stainless steel material selected for strength, heat resistance, and longevity
• Chrome-Plated Stems – Durable chrome stems provide a smooth, wear-resistant surface for consistent valve operation
• Pro-Flo Design – Reduced stem diameter in the fillet area increases airflow while simultaneously reducing overall valve weight
• Swirl-Polished Under Heads – Enhances airflow efficiency into the combustion chamber
• Fully Hardened Tips – Resists wear from rocker arm or follower contact under high-RPM conditions
• Completely Machined Combustion Faces – Ensures proper sealing and optimal combustion efficiency
• Closely Controlled Margin Heights – Precision manufacturing for consistent performance across all 12 valves
• Exact Stem-to-Seat Concentricity – Provides a superior valve-to-seat seal, reducing blow-by and improving performance

Manley's Pro-Flo intake valve design is a hallmark of their Sport Compact lineup, reducing weight in the fillet area to promote better throttle response and higher RPM capability without sacrificing strength. These valves are suitable across a wide range of performance builds — from mild street-driven Sport Compact vehicles all the way to high-horsepower competition builds exceeding 1,000 horsepower, including drag racing and drifting applications.

With exacting tolerances and premium materials, the Manley 11124-12 valve set is a direct upgrade over stock valves and an ideal choice for engine builders seeking proven performance in a Sport Compact application.