What material are these Manley exhaust valves made from?

These Manley Race Series exhaust valves are constructed from XH-426 stainless steel. This material is chosen for its durability and ability to withstand high engine temperatures.

What is the benefit of the swirl-polished under-head areas and chrome stems?

The swirl-polished under-head areas help to smooth airflow into the cylinder, which can improve combustion efficiency. The chrome-plated stems and hard tips are incorporated to increase longevity and wear resistance over time.

Are these valves suitable for performance or racing applications?

Yes, Manley's Race Series valves are designed for demanding applications, including bracket, drag, and oval track racing, and are recommended for engines operating under 8000 RPM.

Specifications

Brand: Manley Performance
Part #: 11123-12
UPC: 807298056234

Manley 94-98 Toyota Supra 3.0L I/L 6cyl (2JZGE-2JZGTE) DOHC 24 Exhaust 29mm Stainless Race Master V

Name: Manley 94-98 Toyota Supra 3.0L I/L 6cyl (2JZGE-2JZGTE) DOHC 24 Exhaust 29mm Stainless Race Master V
Brand: Manley Performance
SKU: manley-performance-manley-94-98-toyota-supra-3-0l-i-l-6cyl-2jzge-2jzgte-dohc-24--t14-5535
Price: 344.59 USD
Availability: BackOrder

$344.59

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Fits 1993-2005 Lexus GS300. Manley stainless steel exhaust valves are built for durability and improved airflow.

Key Features

Fits 1993-2005 Lexus GS300, 2001-2005 Lexus IS300, 1992-2000 Lexus SC300, and 1993-1998 Toyota Supra.
These are exhaust valves with a 29mm diameter and a Race Master V straight stem design.
Constructed from XH-426 stainless steel for durability and resistance to high temperatures.
Features chrome-plated stems and hard tips for enhanced wear resistance and longevity.
Swirl-polished under-head areas and fully machined combustion faces help optimize airflow.
Recommended for use in alcohol engines, offering reliable performance in demanding conditions.

⚠️ 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 29mm diameter, these Manley Race Series exhaust valves are made from XH-426 stainless steel, a strong material chosen for its ability to handle high temperatures and resist corrosion, especially important for engines running on alcohol fuels. They are fully machined with swirl-polished under-head areas to help smooth out airflow as the mixture enters the cylinder, contributing to better combustion efficiency. The stems are chrome-plated and feature hard tips, which adds to their longevity and resistance to wear over time, a practical detail that means they'll hold up better in demanding engine builds.

These are the Race Master V style, meaning they have a straight stem, designed to fit specific cylinder head port configurations. Manley builds these valves for engines that might see up to 8000 RPM, so they're well-suited for performance applications where reliability is key. If you're rebuilding the top end of your 2JZ-GE or 2JZ-GTE engine, these valves are a solid option for ensuring consistent performance and durability.