Manley Performance Race Flo Intake Valves

Chrysler 300C / Dodge Charger / Magnum 05-08 5.7L Hemi

Part #: 11666-8

Overview

The Manley Performance 2.020" Triple Groove Race Flo Intake Valve Set is engineered specifically for Dodge 5.7L HEMI engines from 2003 to 2008. Designed to meet the rigorous demands of bracket, drag, and oval track racing, these intake valves deliver reliable performance at engine speeds up to 8000 RPM. Built for enthusiasts and racers seeking enhanced airflow and durability, this set provides a race-proven upgrade that supports improved engine breathing and consistent power delivery under aggressive conditions.

Whether you are building a high-performance street machine or a dedicated race engine, Manley’s intake valves offer precision engineering and robust construction to help maximize combustion efficiency and valvetrain reliability.

Key Features

Manley’s Race Flo Intake Valves combine advanced design with durable materials to optimize your 5.7L HEMI’s performance. Key features include:

• Constructed from high-grade stainless steel for exceptional strength and corrosion resistance
• Specifically designed for Dodge 5.7L HEMI engines with a 2.02-inch intake valve head diameter
• Optimized valve geometry to enhance airflow and combustion efficiency over factory valves
• Engineered to withstand high-RPM operation up to 8000 RPM, ideal for racing applications
• Precision-machined stems and heads ensure consistent sealing and reduced wear
• Compatible with factory valve guides and seats for straightforward installation
• Ideal for bracket racing, drag racing, and oval track competition where reliability is critical

Construction & Design

These intake valves feature a premium stainless steel construction that balances strength with corrosion resistance, essential for the extreme environment inside a high-performance combustion chamber. Each valve is precision-machined to tight tolerances, ensuring optimal sealing and long-lasting durability.

The Race Flo design focuses on maximizing airflow through the intake ports, improving volumetric efficiency and power output. The 2.02-inch valve head diameter is a popular upgrade size for the 5.7L HEMI, offering a larger flow area than stock valves without compromising reliability. Designed to fit directly into factory valve guides and seats, these valves simplify installation and reduce the need for costly machine work.

Installation & Fitment

This set of intake valves is a direct-fit upgrade for Dodge 5.7L HEMI engines from 2003 through 2008. Compatible with factory valve guides and seats, installation requires standard valve job procedures without the need for cutting, drilling, or special tuning beyond normal engine assembly practices. Professional installation is recommended to ensure proper valve seat contact and valvetrain geometry for optimal performance and longevity.

What's Included

• Set of 8 stainless steel intake valves, 2.02 inches in diameter, designed for Dodge 5.7L HEMI engines

Ideal For

• Bracket racers seeking durable, high-performance valvetrain components
• Drag racers requiring reliable intake valves for sustained high-RPM operation
• Oval track competitors looking to improve airflow and throttle response
• Performance enthusiasts upgrading their 5.7L HEMI for enhanced power and durability

Fitment Details

Compatible with the following vehicles equipped with the 5.7L HEMI engine from 2003 to 2008:

• Chrysler 300, 300C
• Dodge Challenger, Charger, Dakota, Durango, Magnum, Ram 1500, Ram 2500, Ram 3500
• Jeep Commander, Grand Cherokee, Wagoneer
• Ram 1500, Ram 2500, Ram 3500

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.