What material are these Manley intake valves made from?

These intake valves are constructed from stainless steel, which is chosen for its durability. They also feature chrome-plated stems and hard tips to further enhance their resistance to wear.

Are these valves suitable for high-RPM use?

Yes, Manley's Race Series valves are designed for engines operating under 8000 RPM. This makes them a good choice for performance-oriented builds.

What is the benefit of the swirl-polished and machined faces?

The swirl-polished under-head areas help to smooth the flow of air into the combustion chamber, while the fully machined combustion faces contribute to better combustion efficiency.

Specifications

Brand: Manley Performance
Part #: 11386-8
UPC: 807298055732

Manley 88-91 Honda Civic CRX SI 1.6L SOHC 16 Valve (DA16A6) 30mm Race Flo Intake Valves (Set of 8)

Name: Manley 88-91 Honda Civic CRX SI 1.6L SOHC 16 Valve (DA16A6) 30mm Race Flo Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-88-91-honda-civic-crx-si-1-6l-sohc-16-valve-da16a6-30m-t14-278099
Price: 229.72 USD
Availability: BackOrder

$229.72

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Fits 1988-1991 Honda CRX SI. Manley Race Flo intake valves (set of 8) are made from stainless steel with chrome stems for improved durability.

Key Features

Fits 1988-1991 Honda CRX and 1990-1991 Honda Civic.
Set of 8 Manley Race Flo intake valves for your 1.6L SOHC 16-valve engine.
Constructed from stainless steel for durability.
Features chrome-plated stems and hard tips for enhanced wear resistance.
Swirl-polished under-head areas and fully machined combustion faces optimize airflow and combustion efficiency.
Designed for engines operating under 8000 RPM.

⚠️ 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 is well-known for making strong engine components for racing applications. If you're rebuilding the top end of your 1988-1991 Honda CRX SI with the DA16A6 engine, these Manley Race Flo intake valves are a solid option. They are designed for engines running up to 8000 RPM, making them suitable for street performance or track use.

These intake valves are constructed from stainless steel, which is a durable material that holds up well over time. They also feature chrome-plated stems and hard tips to resist wear, especially in the valve guides and seats. The under-head areas are swirl-polished to help smooth airflow into the combustion chamber, and the combustion faces are fully machined for better efficiency. The Race Flo shape is a specific design choice for certain engine builds where airflow characteristics are critical.

This set includes eight intake valves, enough for your 1.6L SOHC 16-valve engine. Remember to check your specific engine's requirements and consult with your machine shop or builder to ensure these valves are the right fit for your build.