What material are these Manley exhaust valves made from?

These Manley Race Master exhaust valves are constructed from XH-426 stainless steel. This material is chosen for its durability and ability to withstand the demanding conditions found in racing engines.

What is the benefit of the chrome stems and hard tips?

The chrome-plated stems and hardened tips are incorporated to enhance longevity and wear resistance. This helps ensure the valves can handle repeated cycles and maintain their performance over time.

Are these valves suitable for all types of engines?

These valves are specifically designed for high-performance racing engines operating under 8000 RPM, such as those used in bracket, drag, and oval track racing. They are also recommended for alcohol engines due to their robust construction.

Specifications

Brand: Manley Performance
Part #: 12333-8
UPC: 807298079400

Manley 12-14 Chrysler Hemi 6.4L 1.675in Head Dia Race Master Exhaust Valves (Set of 8)

Name: Manley 12-14 Chrysler Hemi 6.4L 1.675in Head Dia Race Master Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-12-14-chrysler-hemi-6-4l-1-675in-head-dia-race-master--t14-330410
Price: 235.06 USD
Availability: BackOrder

$235.06

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Manley 12-14 Chrysler Hemi 6.4L 1.675in Head Dia Race Master Exhaust Valves (Set of 8). Stainless steel construction for durability.

Key Features

Fits Chrysler Hemi 6.4L engines.
Set includes 8 exhaust valves.
Valves have a 1.675-inch head diameter.
Constructed from durable XH-426 stainless steel.
Features chrome stems and hard tips for wear resistance.
Swirl-polished under-head areas and fully machined combustion faces optimize airflow.

⚠️ 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

These Manley Race Master exhaust valves feature a 1.675-inch head diameter and are built from XH-426 stainless steel, a material chosen for its toughness in high-performance engines. They are designed for Chrysler Hemi 6.4L engines, specifically those operating under 8000 RPM, making them a solid option for bracket, drag, and oval track racing applications.

You'll find these valves have chrome-plated stems and hardened tips, which helps them stand up to wear and tear over time, extending their service life. The under-head areas are swirl-polished to help smooth airflow, and the combustion faces are fully machined. This attention to detail in machining and polishing helps optimize how air moves into the cylinder and how efficiently the combustion process happens.

Manley offers these in a Race Master (straight stem) design, which is what you're looking at here. They are also recommended for use in alcohol-fueled engines, where their robust construction can handle the specific demands of that fuel type.