• Manley Performance 37mm Stainless Race Flo Valve | Subaru WRX (00-03) / STi (04) (11140-1)
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Manley Performance 37mm Stainless Race Flo Valve | Subaru WRX (00-03) / STi (04) (11140-1)

Manley Performance 37mm Stainless Race Flo Valve | Subaru WRX (00-03) / STi (04) (11140-1)

11140-1

In stock

$24.40 USD
$31.42 USD $24.40 USD
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The Manley Race Series valves are high-performance intake valves designed specifically for Subaru engines, including the 00-03 WRX (EJ20) and 04 STI models. Crafted from stainless steel, these 37mm valves are engineered to withstand the demanding conditions of bracket, drag, and oval track racing. They are meticulously manufactured to meet the rigorous standards required for engines operating under 8000 RPM, ensuring durability and consistent performance. These valves provide enhanced airflow and combustion efficiency, making them an ideal upgrade for racing applications. Their robust construction and precise engineering deliver improved power output and reliability in high-stress environments.

Designed as direct replacements for the stock intake valves on compatible Subaru models, these valves are suitable for engines within the specified year range and engine type. They are intended for use in high-performance racing scenarios, including bracket racing, drag racing, and oval track events. Installation involves standard valve replacement procedures, and the valves are compatible with existing valve seats and guides. The kit includes a set of intake valves, with no additional components specified. These valves are ideal for racers and enthusiasts seeking to optimize airflow and engine efficiency under demanding conditions.

Overview

Manley Performance Intake Valve

Fits 2000–2003 Subaru WRX EJ20 and 2004 Subaru STi

Part #: 11140-1

Overview

The Manley Race Series intake valve is a high-performance component designed for racing enthusiasts and professional tuners seeking maximum durability and efficiency under demanding conditions. Crafted from premium stainless steel, this valve is engineered to withstand the intense heat and pressure experienced in high-revving engines, making it an ideal upgrade for engines operating at up to 8000 RPM. Whether you're building a bracket, drag, or oval track race engine, this valve helps optimize airflow and combustion, contributing to improved engine response and reliability. Designed specifically for Subaru WRX and STi models from 2000 to 2004, this intake valve ensures precise fitment and seamless integration into your existing cylinder head assembly. Its robust construction and meticulous manufacturing process guarantee consistent performance and long-lasting durability, even under the most rigorous racing conditions.

Key Features

This intake valve combines advanced materials and thoughtful design to deliver reliable performance on the track and in high-performance applications. Key features include:
  • Made from high-grade stainless steel for corrosion resistance and strength
  • 37mm diameter to support increased airflow and combustion efficiency
  • Engineered for engines operating at high RPMs up to 8000 RPM
  • Precisely machined for perfect fitment and sealing
  • Designed to withstand extreme thermal and mechanical stresses
  • Ideal for bracket, drag, and oval track racing applications

Construction & Design

The valve features a stainless steel construction that offers excellent durability and resistance to heat and corrosion. Its precise machining ensures optimal sealing and consistent performance, supporting high-revving engine operation. The 37mm diameter is carefully designed to maximize airflow while maintaining structural integrity, making it suitable for high-performance racing engines.

Performance & Driving Experience

This race-grade intake valve is intended to support increased airflow and combustion efficiency, helping your engine achieve better response and power output at high RPMs. Its robust design ensures reliable operation under extreme conditions, providing confidence during intense racing sessions.

Installation & Fitment

Designed specifically for Subaru WRX models from 2000 to 2003 and STi models from 2004, this valve offers a direct replacement fit. Proper installation requires standard engine assembly procedures, and it is recommended to verify compatibility with your specific engine build.

What’s Included

The package includes one high-performance stainless steel intake valve, ready for installation into compatible Subaru engines. Hardware or additional components are not included.
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