What material is this exhaust valve made from?

This Manley Race Series exhaust valve is constructed from high-quality stainless steel. This material is chosen for its durability and ability to withstand the high temperatures and corrosive conditions found in exhaust ports.

What are the specific dimensions of this valve?

This exhaust valve features a 1.940-inch head diameter, an overall length of 5.422 inches, and a 0.3715-inch stem diameter. These dimensions are important for ensuring proper fitment with your cylinder heads and valve train components.

Are these valves suitable for alcohol-fueled engines?

Yes, Manley specifically recommends these valves for exhaust applications in alcohol engines. They are designed to handle the demanding conditions that alcohol fuel can present.

Manley Chevrolet Big Block Exhaust Valve 11849-8

Name: Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3715in Stem
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-big-block-exhaust-valve-kit-1-940in-head-dia-t14-879406
Price: 218.97 USD
Availability: BackOrder

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3715in Stem

$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.

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3715in Stem. Stainless steel construction for durability.

Key Features

This product is a single exhaust valve.
The valve head diameter is 1.940 inches.
The overall length of the valve is 5.422 inches.
The valve stem diameter is 0.3715 inches.
Constructed from high-quality stainless steel for durability.
Features a chrome stem and hard tip for enhanced wear resistance.

⚠️ 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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Product Details

When you're rebuilding the top end of your Chevrolet big block, you need parts that can handle the heat and pressure. This Manley Race Series exhaust valve is built for engines that see serious use, like those in bracket, drag, or oval track racing, especially when operating under 8000 RPM. It's designed to be a reliable component for demanding builds.

You're getting a well-built exhaust valve made from high-quality stainless steel, which is crucial for resisting the high temperatures and corrosive elements found in exhaust ports. The stem is chromed for better wear resistance, and the under-head area is swirl polished to help improve airflow. The combustion face is also fully machined, which helps with efficiency. Manley recommends these for alcohol-fueled engines, which can be particularly tough on exhaust valves.

This specific valve has a 1.940-inch head diameter and an overall length of 5.422 inches, with a 0.3715-inch stem diameter. Make sure these dimensions match your cylinder head and valve spring requirements before ordering.