What material are these Manley exhaust valves made from?

These Manley Street Flo exhaust valves are constructed from high-quality stainless steel. They also feature chrome-plated stems and hardened tips for increased durability and wear resistance.

What is the benefit of the swirl-polished and machined combustion face?

The swirl-polished under-head area and fully machined combustion face are designed to improve airflow into the cylinder and enhance combustion efficiency. This can lead to better engine performance.

Are these valves suitable for racing applications?

Manley's Street Series valves, including these Street Flo models, are ideal for stock or mildly modified street engines. For more extreme racing applications, other Manley series might be more appropriate.

Specifications

Brand: Manley Performance
Part #: 10778-8
UPC: 807298055435

Manley Ford 289/302/351W Street Flo Exhaust Valves 1.850 in Dia for use with Rail Type Rockers

Name: Manley Ford 289/302/351W Street Flo Exhaust Valves 1.850 in Dia for use with Rail Type Rockers
Brand: Manley Performance
SKU: manley-performance-manley-ford-289-302-351w-street-flo-exhaust-valves-1-850-in-d-t14-492455
Price: 208.72 USD
Availability: BackOrder

$208.72

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Manley Ford 289/302/351W Street Flo exhaust valves. 1.850" diameter, designed for rail type rockers, improving airflow in street engines.

Key Features

Fits Ford 289, 302, and 351W engines.
1.850 inch diameter exhaust valves.
Designed for use with rail-type rocker arms.
Made from durable stainless steel for longevity.
Chrome-plated stems and hardened tips increase wear resistance.
Swirl-polished under-head area and fully machined combustion face enhance airflow.

⚠️ 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's Street Flo exhaust valves are a solid option for your Ford 289, 302, or 351W engine, especially if you're looking to improve the performance of a stock or lightly modified build. These valves are designed to work with rail-type rocker arms and feature a 1.850-inch diameter, which helps with airflow into the combustion chamber.

Crafted from high-quality stainless steel, these valves are built to last. The stems are chrome-plated for added durability and wear resistance, and the tips are hardened to handle the stresses of regular use. The area under the head is swirl polished, and the combustion face is fully machined. This attention to detail helps improve airflow and combustion efficiency, making a noticeable difference in how your engine runs.

If you're rebuilding the top end of your Ford V8 and want a well-made valve that offers improved performance for street driving, these Manley Street Flo valves are a good choice.