What makes these valves 'Severe Duty'?

The 'Severe Duty' designation comes from rigorous fatigue testing. These valves endured up to 100 million cycles in testing, far outperforming competitor valves that failed much sooner. This indicates exceptional resistance to the stresses valves experience during operation.

What is the benefit of the NK-844 material?

NK-844 is a special alloy Manley uses for intake valves. It has over four times the ultimate tensile strength of other leading intake valve materials at 1000°F, making it exceptionally strong and durable for high-temperature gasoline engines.

What is the advantage of the 2.080-inch diameter?

The 2.080-inch diameter is larger than a typical stock intake valve. This increased size allows more air-fuel mixture into the cylinder, which can lead to improved engine performance and power output.

Specifications

Brand: Manley Performance
Part #: 11772-8
UPC: 807298001708

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

Name: Manley SBC 2.080 Severe Duty Pro Flo Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-sbc-2-080-severe-duty-pro-flo-intake-valves-set-of-8-t14-4338713
Price: 349.40 USD
Availability: BackOrder

$349.40

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley SBC 2.080" Severe Duty Pro Flo Intake Valves (Set of 8). Built with NK-844 material for high-temperature gasoline engines.

Key Features

Fits SBC (Small Block Chevy) engines.
Intake valves measure 2.080 inches in diameter for improved airflow.
Constructed from NK-844 material, offering superior tensile strength at high temperatures.
Designed for high-temperature gasoline engines.
Features chrome stems and hard tips for enhanced durability.
Swirl polished under head areas and fully machined combustion faces optimize airflow and combustion.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

Manley Performance is well-known for making strong engine components, especially for racing applications. These Severe Duty Pro Flo Intake Valves are a prime example of their commitment to building parts that can handle tough conditions. Designed specifically for SBC (Small Block Chevy) engines, these intake valves feature a 2.080-inch diameter, which is larger than stock, helping to improve airflow into the combustion chamber. They are constructed from NK-844 material, a special alloy chosen for its exceptional strength at high temperatures, making them ideal for gasoline engines that run hot.

What really sets these valves apart is their durability. Manley subjected them to rigorous fatigue testing, simulating the extreme stresses valves endure, especially when they bounce on the seat. These intake valves, made from NK-844, showed over four times the ultimate tensile strength compared to other leading intake valve materials at 1000°F. They also feature chrome stems and hard tips for added wear resistance, and the under-head areas are swirl polished to help optimize airflow and combustion efficiency. This attention to detail means you're getting a well-built part designed to last.