What material are these Manley valves made from?

These Manley Race Series valves are made from stainless steel. They also feature chrome-plated stems and hardened tips for improved durability and wear resistance.

Are these valves suitable for all engine builds?

These valves are specifically designed for performance applications, handling engines up to 8000 RPM. They are also recommended for exhaust valves in alcohol engines, indicating their suitability for demanding conditions.

What is the benefit of the swirl polished and machined faces?

The swirl polished under-head areas and fully machined combustion faces are designed to optimize airflow into the combustion chamber. This can contribute to improved engine efficiency and performance.

Specifications

Brand: Manley Performance
Part #: 11140-8
UPC: 807298051062

Manley 00-03 Subaru WRX (EJ20) / 04 STi Intake 37mm Stainless Race Flo Valves

Name: Manley 00-03 Subaru WRX (EJ20) / 04 STi Intake 37mm Stainless Race Flo Valves
Brand: Manley Performance
SKU: manley-performance-manley-00-03-subaru-wrx-ej20-04-sti-intake-37mm-stainless-rac-t14-5546
Price: 218.24 USD
Availability: InStock

$218.24

Only 4 left in stock

Fits 2002-2012 Subaru Impreza. Manley 37mm stainless steel intake valves for improved airflow and durability.

Key Features

Fits 2002-2012 Subaru Impreza and 2005-2006 Saab 9-2X.
Intake valves measure 37mm in diameter with a Race Flo shape.
Constructed from durable stainless steel for long-lasting performance.
Features chrome-plated stems and hardened tips for enhanced wear resistance.
Swirl polished under-head areas and fully machined combustion faces help optimize airflow.
Recommended for engines operating under 8000 RPM.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Starting with a 37mm intake diameter and a Race Flo shape, these Manley valves are built for performance in your 2002-2012 Subaru Impreza. They are designed to handle the demands of engines running up to 8000 RPM, making them a solid choice for anyone rebuilding or upgrading their engine internals.

These valves are constructed from stainless steel, which is a strong material that resists corrosion. The stems are chrome-plated and the tips are hardened, adding extra durability for long-term wear resistance. The under-head areas are swirl polished and the combustion faces are fully machined. This attention to detail helps optimize airflow into the combustion chamber, contributing to better engine efficiency.

If you're working on a performance build for your Impreza, especially one that might use alcohol-based fuels, these Manley valves are a well-built option to consider. They are designed to fit right into your engine's cylinder head, simplifying the installation process.