What material are these intake valves made from and why is it important?

These intake valves are constructed from NK-844 material. This specific material is chosen for its exceptional strength at high temperatures, boasting over four times the ultimate tensile strength of typical intake valve materials at 1000°F, which is crucial for performance engine reliability.

What does the '.400 Longer' specification mean for installation?

The '.400 Longer' designation means these valves are 0.400 inches longer than standard intake valves for Small Block Chevrolet engines. This is often done to accommodate specific cylinder head porting, camshaft profiles, or valve spring installations, and may require adjustments to valve train geometry.

Are these valves suitable for everyday street use or only racing?

While built to 'Severe Duty' standards and tested for extreme conditions, these valves are well-suited for high-temperature gasoline engines, which can include performance street applications. Their robust construction and material properties offer improved durability and reliability over standard valves.

Specifications

Brand: Manley Performance
Part #: 11752-8
UPC: 807298052021

Manley Small Block Chevrolet 2.100in Head Diameter .400 Longer Severe Duty Intake Valves - Set of 8

Name: Manley Small Block Chevrolet 2.100in Head Diameter .400 Longer Severe Duty Intake Valves - Set of 8
Brand: Manley Performance
SKU: manley-performance-manley-small-block-chevrolet-2-100in-head-diameter-400-longer-t14-626697
Price: 361.47 USD
Availability: BackOrder

$361.47

On Backorder

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

Manley Small Block Chevrolet 2.100in Head Diameter .400 Longer Severe Duty Intake Valves - Set of 8. Built for high-temp gasoline engines.

Key Features

Set of 8 intake valves for Small Block Chevrolet engines.
Made from NK-844 material, offering superior tensile strength at high temperatures.
Features a 2.100-inch head diameter and is .400 inches longer than standard valves.
Chrome stems and hard tips enhance durability and longevity.
Swirl-polished under-head areas and fully machined faces improve airflow.
Proven through rigorous fatigue tests to withstand over 100 million cycles.

These valves are designed for Small Block Chevrolet engines. Please verify compatibility with your specific engine configuration.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

These Manley Severe Duty intake valves are made from NK-844 material, which has over four times the ultimate tensile strength of typical intake valve materials at 1000°F. They feature a 2.100-inch head diameter and are .400 inches longer than stock, designed specifically for Small Block Chevrolet engines. The chrome stems and hard tips add to their durability, while the swirl-polished under-head areas and fully machined faces help improve airflow into the combustion chamber.

Manley's Severe Duty valves have undergone extensive fatigue testing, enduring up to 100 million cycles under high stress, which is significantly more than many competing valves. This makes them a solid option for high-temperature gasoline engines where reliability under demanding conditions is crucial. The NK-844 material is chosen for its strength at elevated temperatures, ensuring consistent performance.

This set includes eight intake valves, ready for your engine build. If you're rebuilding the top end of your Small Block Chevrolet and need valves that can handle the heat and stress of performance applications, these Manley valves are a well-built choice.