What material are these Manley exhaust valves made from?

These Manley Race Flo exhaust valves are constructed from XH-426 stainless steel. This material is chosen for its durability and ability to withstand the high temperatures and stresses found in performance engines.

Are these valves suitable for alcohol-fueled engines?

Yes, these specific exhaust valves are recommended for use in alcohol engines. They are designed to provide reliable performance even under the demanding conditions associated with alcohol fuels.

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 improve airflow into the cylinder. This can lead to better combustion efficiency and potentially improved engine performance.

Specifications

Brand: Manley Performance
Part #: 11365-8
UPC: 807298048895

Manley Small Block Chevy LS-1 / LS-2 (LS-6 Head) 1.600 Head Diameter Race Flo Exhaust Valves

Name: Manley Small Block Chevy LS-1 / LS-2 (LS-6 Head) 1.600 Head Diameter Race Flo Exhaust Valves
Brand: Manley Performance
SKU: manley-performance-manley-small-block-chevy-ls-1-ls-2-ls-6-head-1-600-head-diame-t14-274389
Price: 218.97 USD
Availability: BackOrder

$218.97

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Fits 1997-2004 Chevrolet Corvette. Manley Race Flo Exhaust Valves are built from stainless steel with swirl-polished under-head areas for improved airflow.

Key Features

Fits 1997-2004 Chevrolet Corvette, 1998-2002 Chevrolet Camaro, 1998-2002 Pontiac Firebird, 2004 Pontiac GTO, and 2004-2005 Cadillac CTS.
Constructed from durable stainless steel (XH-426) for the exhaust valves.
Features chrome stems and hard tips for enhanced longevity and wear resistance.
Swirl polished under-head areas and fully machined combustion faces help optimize airflow.
Designed for engines operating under 8000 RPM, suitable for racing applications.
Recommended for exhaust valves in alcohol engines for reliable 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 well-known for making strong engine components for racing applications. If you're rebuilding the top end of your 1997-2004 Chevrolet Corvette, these Manley Race Flo exhaust valves are a solid option. They are designed to handle the demands of engines running up to 8000 RPM, making them suitable for bracket, drag, and oval track racing.

These exhaust valves are made from stainless steel, specifically XH-426, which offers good durability. The stems are chromed and have hard tips for better wear resistance over time. You'll also find the under-head areas are swirl polished and the combustion faces are fully machined. This design helps optimize airflow into the cylinder and can improve combustion efficiency. They are also recommended for use in alcohol-fueled engines, offering reliable performance in those demanding conditions.

With a 1.600-inch head diameter and a .3136-inch stem diameter, these valves are built for performance. They have an overall length of 4.923 inches, ensuring they fit correctly within the cylinder head. If you're looking for well-built exhaust valves for your high-performance Small Block Chevy LS engine, these are a great choice.