What material are these intake valves made from?

These Manley Severe Duty? intake valves are made from NK-844 steel. This material is chosen for its exceptional tensile strength, especially at high temperatures common in performance gasoline engines.

What is the benefit of the swirl-polished under-head areas?

The swirl-polished design on the underside of the valve head helps to improve airflow into the cylinder. This can contribute to better combustion efficiency and overall engine performance.

Are these valves sold individually or as a set?

This product is a set of eight (8) Manley SBC Severe Duty? Intake Valves, which is the standard quantity needed for a V8 engine.

Specifications

Brand: Manley Performance
Part #: 11736-8
UPC: 807298015903

Manley SBC 2.080 Severe Duty Intake Valves (Set of 8)

Name: Manley SBC 2.080 Severe Duty Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-sbc-2-080-severe-duty-intake-valves-set-of-8-t14-4338204
Price: 349.40 USD
Availability: BackOrder

$349.40

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Manley SBC 2.080" Severe Duty Intake Valves (Set of 8). Made from NK-844 steel for high-temperature gasoline engines.

Key Features

Set of 8 Manley Severe Duty? Intake Valves for SBC engines.
Constructed from NK-844 steel, known for its high tensile strength at elevated temperatures.
Designed for high-temperature gasoline engines.
Features chrome stems and hard tips for increased durability.
Swirl-polished under-head areas and fully machined combustion faces improve airflow.
Rigorous fatigue testing shows exceptional cycle endurance.

These are SBC (Small Block Chevy) valves. Please verify compatibility with your specific engine build and cylinder heads.

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About this part

Product Details

Manley Performance is well-known for making strong engine components for racing and high-performance applications. These Severe Duty? Intake Valves are a prime example, built for demanding SBC (Small Block Chevy) engines. They are designed to handle the intense heat and stress found in high-temperature gasoline engines, ensuring reliable performance when you need it most.

These intake valves are crafted from NK-844 material, which Manley states has over four times the ultimate tensile strength of competing intake valve materials at 1000?F. They also feature chrome stems and hard tips for added durability, along with swirl-polished under-head areas and fully machined combustion faces. This design helps improve airflow into the combustion chamber, contributing to better efficiency. Manley's Severe Duty? valves have undergone extensive fatigue testing, showing exceptional endurance compared to other options on the market.

This set includes eight intake valves, enough for a standard V8 engine. If you're rebuilding the top end of a performance SBC engine, these valves are built to withstand the rigors of serious use.