What material are these valves made from?

These Manley Race Master exhaust valves are constructed from XH-426 stainless steel, chosen for its durability in high-performance engine applications.

Are these valves suitable for street use?

While built for racing, these valves are designed for engines operating under 8000 RPM and can be used in demanding applications. Their stainless steel construction and hard tips offer good wear resistance.

What is the purpose 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 and enhance combustion efficiency for better engine performance.

Specifications

Brand: Manley Performance
Part #: 11666B-8

Manley thru 08 Chevy Hemi 5.7L w/ Bead Loc Groove 2.020in Race Master Exhaust Valves (Set of 8)

Name: Manley thru 08 Chevy Hemi 5.7L w/ Bead Loc Groove 2.020in Race Master Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-thru-08-chevy-hemi-5-7l-w-bead-loc-groove-2-020in-race-t14-566866
Price: 230.31 USD
Availability: BackOrder

$230.31

On Backorder

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

Manley Race Master exhaust valves for Chevy Hemi 5.7L engines. Stainless steel construction for durability.

Key Features

Fits Chevy Hemi 5.7L engines through 2008.
Set includes eight Race Master exhaust valves with a 2.020-inch diameter.
Constructed from durable XH-426 stainless steel.
Chrome stems and hard tips enhance longevity and wear resistance.
Swirl polished under-head areas and fully machined combustion faces optimize airflow.
Features a bead lock groove for specific applications.

⚠️ 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

If you're rebuilding the top end of your Chevy Hemi 5.7L engine, especially for racing applications under 8000 RPM, these Manley Race Master exhaust valves are a solid option. They are designed to handle the stress of bracket, drag, and oval track racing.

These valves are made from XH-426 stainless steel, which is known for its durability. The stems are chrome-plated and feature hard tips to resist wear over time, and the under-head areas are swirl polished while the combustion faces are fully machined. This machining helps optimize airflow into the cylinder and improve combustion efficiency. The bead lock groove is also a notable feature for certain setups.

Manley recommends these valves for exhaust use in alcohol-fueled engines, where they can provide reliable performance. They come as a set of eight, ready for installation in your Hemi 5.7L.