What kind of engine applications are these valves best suited for?

These valves are specifically designed for demanding applications like Top Fuel drag racing, Funny Car racing, and marine engines. They are also suitable for Small Block Chevy circle track racing where restricted carburetors are used and extreme heat and force resistance is necessary.

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

The valves are made from Manley's XH-432 XtremeAlloy, a material known for its exceptional performance in high-heat and high-stress environments. This material, combined with chrome stems and hard tips, ensures they can withstand the rigors of extreme engine operation and resist wear.

Are these intake or exhaust valves, and do they come with matching parts?

This set contains 8 intake valves. Manley Performance also offers matching exhaust valves in their Severe Duty/Pro Flo line, allowing you to build a complete, high-performance valvetrain for your engine.

Specifications

Brand: Manley Performance
Part #: 11683-8
UPC: 807298056548

Manley Chevy LS-1/LS-2 w LS-6 Head Small Block 1.600 Severe Duty/Pro Flo Intake Valves (Set of 8)

Name: Manley Chevy LS-1/LS-2 w LS-6 Head Small Block 1.600 Severe Duty/Pro Flo Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-chevy-ls-1-ls-2-w-ls-6-head-small-block-1-600-severe-d-t14-106591
Price: 596.61 USD
Availability: BackOrder

$596.61

On Backorder

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

Manley Performance Extreme Duty Series intake valves for Chevy LS-1/LS-2/LS-6 heads. Set of 8. Built for extreme force and heat resistance.

Key Features

Fits Chevy LS-1, LS-2, and LS-6 cylinder heads.
Set includes 8 intake valves.
Head diameter measures 1.600 inches.
Stem diameter is .3136 inches.
Overall length is 4.923 inches.
Constructed from XH-432 XtremeAlloy for extreme force and heat resistance.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

Manley Performance is known for making strong engine components for racing and high-performance applications. These Extreme Duty Series valves are a prime example, built to handle the intense demands of serious engine builds. If you're working on a high-horsepower Small Block Chevy, especially one destined for drag racing or marine use where extreme heat and force are common, these valves are designed to keep up.

What sets these valves apart is the XH-432 XtremeAlloy material, which is a hallmark of Manley's commitment to robust valve construction. They feature chrome stems and hard tips, which are crucial for resisting wear and ensuring these valves last through many demanding cycles. The under-head areas are swirl polished to help improve airflow, and the combustion faces are fully machined to boost combustion efficiency. This attention to detail means you're getting a part that's not just strong, but also optimized for performance.

This set includes eight intake valves, each with a 1.600-inch head diameter and a .3136-inch stem diameter, with an overall length of 4.923 inches. While these are intake valves, Manley also offers matching exhaust valves in their Severe Duty/Pro Flo line, so you can build a complete, high-performance valvetrain. Remember to consult your engine build specifications and manufacturer instructions for proper installation and compatibility with your specific cylinder heads.