What makes these valves suitable for high-RPM engines?

These Manley Race Series valves are designed for engines operating up to 8000 RPM. Their stainless steel construction, chrome stems, and hard tips contribute to durability and wear resistance under demanding conditions.

Are these valves a direct replacement for my stock Subaru Impreza valves?

Yes, these valves are designed as a direct fit for the specified Subaru Impreza and Saab 9-2X models. The Race Master style with a straight stem is a common configuration for performance engine builds.

What is the benefit of the swirl polished and machined combustion face?

The swirl polished under head areas and fully machined combustion faces are done to optimize airflow through the valve and into the combustion chamber. This can help improve combustion efficiency and overall engine performance.

Specifications

Brand: Manley Performance
Part #: 11155-8
UPC: 807298044637

Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves

Name: Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves
Brand: Manley Performance
SKU: manley-performance-manley-00-03-subaru-wrx-ej20-04-sti-exhaust-32mm-stainless-ra-t14-5555
Price: 229.72 USD
Availability: BackOrder

$229.72

On Backorder — Expected to ship by May 3, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2002-2012 Subaru Impreza. Manley exhaust valves are well-built from stainless steel for durability and improved airflow.

Key Features

Fits 2002-2012 Subaru Impreza and 2005-2006 Saab 9-2X.
Constructed from durable stainless steel for long-lasting performance.
Features chrome stems and hard tips for enhanced wear resistance.
Swirl polished under head areas and fully machined combustion faces help optimize airflow.
Race Master (straight stem) design is suitable for many performance engine builds.
Recommended for exhaust valves in alcohol engines, indicating robust performance.

⚠️ 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

Manley Performance is known for making strong internal engine components, and these Race Master exhaust valves are a great example of that. If you're working on the engine for your 2002-2012 Subaru Impreza, especially if you're rebuilding the top end or looking for an upgrade over stock, these valves are designed to handle the heat and stress of performance driving. They are specifically crafted for engines that might run up to 8000 RPM, making them a solid choice for many Subaru builds.

These valves are made from stainless steel, which is a well-built material that holds up well over time. The stems are chrome-plated and have hard tips, adding to their longevity and resistance to wear. You'll also notice they're swirl polished under the head and fully machined on the combustion face. This machining helps optimize how air moves through the engine and can contribute to more efficient combustion. They are also recommended for use in alcohol-fueled engines, which tells you something about their durability in demanding conditions.

These are the Race Master style, meaning they have a straight stem, which is a common choice for many performance applications. If you're looking for a well-made exhaust valve that offers improved airflow and durability for your Subaru, these are a strong option to consider.