What material is this exhaust valve made from?

This Manley exhaust valve is constructed from XH-426 stainless steel, chosen for its durability and resistance to high temperatures. The stems are chrome-plated and the tips are hardened for added wear resistance.

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

The swirl polishing on the under-head area and the fully machined combustion face are designed to help improve airflow into the cylinder. This can contribute to better combustion efficiency and overall engine performance.

Are these valves suitable for a standard engine rebuild or only for racing applications?

While designed for racing applications under 8000 RPM, these valves are a well-built component suitable for performance-oriented engine rebuilds. Their durable construction and improved airflow characteristics can benefit a wide range of modified 1.6L SOHC engines.

Specifications

Brand: Manley Performance
Part #: 11368-8
UPC: 807298055633

Manley 92-00 Honda Civic 1.6L SOHC 16 Valve 31mm Race Flo Exhaust Valve

Name: Manley 92-00 Honda Civic 1.6L SOHC 16 Valve 31mm Race Flo Exhaust Valve
Brand: Manley Performance
SKU: manley-performance-manley-92-00-honda-civic-1-6l-sohc-16-valve-31mm-race-flo-exh-t14-133590
Price: 229.72 USD
Availability: BackOrder

$229.72

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Fits 1992-2000 Honda Civic. Manley Race Flo exhaust valve made from stainless steel with a chrome stem for improved durability.

Key Features

Fits 1992-2000 Honda Civic and 1993-1997 Honda Civic del Sol.
Constructed from durable XH-426 stainless steel for the exhaust side.
Features chrome-plated stems and hard tips for improved wear resistance and longevity.
Swirl polished under-head areas and fully machined combustion faces help optimize airflow.
Race Flo shape is designed for improved flow in racing engines under 8000 RPM.
Recommended for use in alcohol-fueled 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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About this part

Product Details

If you're rebuilding the top end of your 1992-2000 Honda Civic with the 1.6L SOHC engine, these Manley Race Flo exhaust valves are a solid option. They're built from high-quality stainless steel, specifically XH-426 for the exhaust side, which is important for handling the heat and stress of combustion. The stems are chrome-plated and the tips are hardened, adding to their longevity and resistance to wear, especially if you're running alcohol fuels, as these are recommended for that application.

Manley also swirl polishes the under-head areas and fully machines the combustion faces. This isn't just for looks; it helps improve airflow into the cylinder and can contribute to better combustion efficiency. The Race Flo shape is designed to optimize flow for racing engines, particularly those operating under 8000 RPM, making them a good choice for bracket, drag, or oval track use.

When you're putting an engine back together, using well-built components like these valves makes a difference. They're designed to fit right into your stock-sized 31mm exhaust port, making the installation process straightforward as long as you're following proper engine rebuilding procedures.