What material are these exhaust valves made from?

These Manley exhaust valves are constructed from stainless steel, which offers good durability. They also feature chrome stems and hard tips to further enhance their resistance to wear.

Are these valves suitable for high-RPM engines?

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

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 optimize airflow and combustion efficiency. This helps your engine perform better, especially under demanding conditions.

Specifications

Brand: Manley Performance
Part #: 11363-8
UPC: 807298048871

Manley Small Block Chevy LS-1 / LS-2 (LS-6 Head) 1.575 Head Diameter Race Flo Exhaust Valves

Name: Manley Small Block Chevy LS-1 / LS-2 (LS-6 Head) 1.575 Head Diameter Race Flo Exhaust Valves
Brand: Manley Performance
SKU: manley-performance-manley-small-block-chevy-ls-1-ls-2-ls-6-head-1-575-head-diame-t14-4370932
Price: 218.97 USD
Availability: BackOrder

$218.97

On Backorder

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

Fits 1997-2004 Chevrolet Corvette. Manley Race Flo exhaust valves improve airflow for high-RPM engines.

Key Features

Fits 1997-2004 Chevrolet Corvette, 1998-2002 Chevrolet Camaro, 1998-2002 Pontiac Firebird, 2004 Pontiac GTO, and 2004-2005 Cadillac CTS.
Each exhaust valve has a 1.575-inch head diameter and a 4.923-inch overall length.
Constructed from stainless steel for strong durability.
Features chrome stems and hard tips for improved wear resistance.
Swirl polished under-head areas and fully machined combustion faces help optimize airflow.
Recommended for exhaust valves in alcohol engines.

⚠️ 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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Will this fit your vehicle?

About this part

Product Details

When you're rebuilding the top end of your Small Block Chevy LS-1, LS-2, or LS-6 head engine, you want parts that can handle the stress. This set of Manley Race Flo exhaust valves is built for engines that see serious action, especially those running up to 8000 RPM. You get a pair of exhaust valves, each with a 1.575-inch head diameter, designed to help your engine breathe better.

These valves are made from stainless steel, which is a solid choice for durability, and they feature chrome stems and hard tips to resist wear over time. The under-head area is swirl polished and the combustion face is fully machined. This attention to detail helps optimize airflow and combustion efficiency, making a noticeable difference when you're pushing your engine hard. They're even recommended for alcohol-fueled engines, showing how robust they are.

With an overall length of 4.923 inches and a .3136-inch stem diameter, these valves are designed to fit right into your compatible LS engine. If you're looking for improved performance and reliability for your racing or performance build, these Manley valves are a well-built option.