• Manley Extreme Duty 32mm Exhaust Valves | Subaru WRX (00-03) / STi (04)
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Manley Extreme Duty 32mm Exhaust Valves | Subaru WRX (00-03) / STi (04)

Manley Extreme Duty 32mm Exhaust Valves | Subaru WRX (00-03) / STi (04)

11137-8

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$506.87 USD
$652.79 USD $506.87 USD
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The Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves are high-performance engine components designed to withstand the rigors of demanding racing applications. Crafted from durable stainless steel, these valves are engineered to deliver exceptional strength and heat resistance, making them suitable for high-stress environments. Their design ensures reliable operation under extreme conditions, providing improved airflow and combustion efficiency. These valves are ideal for enthusiasts seeking to enhance their vehicle's performance, whether for street use or competitive racing, by offering increased durability and consistent valve seating.

Specifically tailored for 2000-2003 Subaru WRX models with the EJ20 engine and 2004 Subaru STi models, these valves serve as direct replacements or upgrades for stock components. They are suitable for use in turbocharged applications and are compatible with performance modifications that demand higher valve strength. Installation involves standard valve replacement procedures, and the kit includes the necessary valves for both intake and exhaust. These Extreme Duty Valves are perfect for street, track, or racing setups where durability and performance are paramount.

Overview

Manley Performance Exhaust Valves

Fits 2000–2003 Subaru WRX EJ20 and 2004 Subaru STi

Part #: 11137-8

Overview

The Manley Extreme Duty Series Exhaust Valves are high-performance components designed for serious automotive enthusiasts and professional racers. Crafted from premium stainless steel, these valves are engineered to withstand extreme conditions, making them ideal for demanding applications such as turbocharged engines and high-revving setups. Whether you're building a race-ready Subaru WRX or a Subaru STi, these valves provide the durability and reliability needed to maximize engine performance and longevity. They are perfect for those seeking to enhance their vehicle’s response, airflow, and overall efficiency under high-stress conditions.

Key Features

Designed with precision manufacturing, these valves feature a robust stainless steel construction that offers excellent heat resistance and strength. The 32mm diameter ensures optimal airflow and combustion efficiency. Engineered for extreme duty, they support high-performance builds and aggressive driving styles. The valves are compatible with a range of tuning and modification projects, providing a reliable upgrade for your engine’s valvetrain.

Construction & Design

Manufactured from high-grade stainless steel, these valves are built to endure the intense heat and pressure of high-performance engines. The design emphasizes durability and consistent performance, with precise machining to ensure perfect fitment and sealing. The 32mm size is optimized for enhanced airflow, supporting increased power output and improved throttle response.

Performance & Response

These valves are intended to support high-revving and turbocharged applications, helping to improve exhaust flow and engine breathing. They contribute to better throttle response and more efficient combustion, which can translate into increased power and responsiveness during aggressive driving or racing conditions.

Installation & Fitment

Designed as direct replacements for OEM valves, these components are intended for professional installation or experienced enthusiasts familiar with engine assembly. Proper installation ensures optimal performance and longevity.

What’s Included

The package includes a set of stainless steel exhaust valves, ready for installation into compatible Subaru EJ20 and STi engines. Hardware or additional components are not included and may require separate purchase.

Ideal For

Perfect for race car builders, performance tuners, and Subaru enthusiasts aiming to push their engines to the limit with reliable, high-quality valvetrain components.
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