Manley Performance Race Flo Intake Valve Set

2003–2008 Chrysler, Dodge, Jeep & Ram 5.7L HEMI Engines

Part #: 11666HB-8

Overview

The Manley Race Flo Hollow Stem Intake Valve Set is engineered specifically for the Dodge HEMI Gen III 5.7L engines produced between 2003 and 2008. Designed to withstand the rigorous demands of bracket, drag, and oval track racing, these valves are built for engines operating up to 8000 RPM. This valve set enhances your engine’s breathing capabilities, improving airflow and combustion efficiency for consistent high-performance operation.

Ideal for racers and performance enthusiasts, Manley’s Race Flo valves offer a precision-engineered solution that supports aggressive driving conditions while maintaining durability and reliability. With Manley’s proven reputation for quality and innovation, these valves help maximize power output and valve train responsiveness in naturally aspirated or forced induction setups.

Key Features

Manley Race Flo intake valves incorporate advanced design and premium materials to deliver superior performance and longevity:

• Constructed from high-grade stainless steel for exceptional strength and heat resistance
• Race Flo design promotes improved airflow compared to standard valves, enhancing engine breathing
• Bead lock groove ensures secure retention of valve keepers for reliable operation at high RPM
• Hollow stem construction reduces valve weight, allowing quicker valve response and reduced valve train stress
• Precisely sized at 2.020 inches to match factory or performance cylinder heads for optimal fitment
• Engineered for engines operating up to 8000 RPM, ideal for serious racing applications
• Precision manufacturing ensures consistent valve geometry and superior sealing for improved combustion efficiency

Construction & Design

Manley’s Race Flo intake valves are crafted from premium stainless steel, providing excellent resistance to heat and wear in high-performance environments. The hollow stem design significantly reduces reciprocating mass, which improves valve train dynamics and durability at elevated engine speeds. This reduction in weight helps the valves respond faster, reducing stress on related components and enhancing overall engine reliability.

The bead lock groove is a critical safety feature that securely holds the valve keepers in place, preventing valve retention failure during aggressive high-RPM operation. This design detail is essential for racers who demand both reliability and safety under extreme conditions.

Installation & Fitment

This valve set is a direct fit replacement for Dodge HEMI Gen III 5.7L engines from 2003 to 2008, including Chrysler 300/300C, Dodge Challenger, Charger, Dakota, Durango, Magnum, Ram 1500/2500/3500, Jeep Commander, Grand Cherokee, and Wagoneer models. Installation follows standard engine assembly procedures and requires compatible valve springs and retainers to ensure optimal performance. No special modifications are necessary for proper fitment.

What's Included

• Complete set of stainless steel Race Flo intake valves with bead lock groove

Ideal For

• Bracket racers and drag racers seeking reliable high-RPM valve performance
• Oval track racers requiring durable intake valves capable of withstanding rigorous conditions
• Engine builders upgrading Dodge Gen III 5.7L HEMI engines for improved airflow and valve train response
• Performance enthusiasts focused on maximizing power and reliability in naturally aspirated or forced induction setups

Manley Performance manufactures high-strength engine internals for serious builds—especially forged pistons, connecting rods, valves, and valvetrain components developed for racing and high-output street applications. If you’re building for boost, high compression, or sustained RPM, Manley is a common choice for parts engineered to take abuse and keep power reliable.