Manley Performance Race Series Intake Valves

2003–2008 Dodge / Chrysler 5.7L Gen III HEMI V8

11666H-8

Overview:

The Manley 2.020 Triple Groove Race Flo Hollow Stem Intake Valves are precision-engineered components designed specifically for high-performance 5.7L Gen III HEMI engines from 2003 to 2008. Crafted to withstand the intense demands of bracket racing, drag racing, and oval track competition, these valves provide reliable operation at engine speeds up to 8,000 RPM.

Ideal for racers and enthusiasts seeking durable, high-quality valvetrain components, these intake valves help optimize airflow and combustion efficiency. Whether you are building a dedicated race engine or upgrading a performance street machine, Manley’s Race Series valves deliver consistent performance and durability under demanding conditions.

Key Features:

These intake valves incorporate advanced design and materials to meet the rigorous requirements of competitive motorsports:

• Constructed with hollow stems to reduce valvetrain mass, improving valve float resistance and allowing higher RPM operation.
• Triple groove design ensures secure retention and precise valve spring seating for reliable valvetrain stability.
• Race Flo profile enhances airflow dynamics for improved volumetric efficiency and power output.
• Engineered specifically for the 5.7L Gen III HEMI platform, ensuring exact fitment and compatibility.
• Manufactured by Manley Performance, a trusted name in high-performance valvetrain components.
• Designed to perform reliably at engine speeds up to 8,000 RPM, suitable for serious racing applications.
• Set of 8 valves included, covering all intake positions for a V8 engine.

Construction & Design:

Manley’s Race Series intake valves feature hollow stems that significantly reduce reciprocating mass compared to solid valves. This design reduces valvetrain inertia, allowing the engine to rev more freely and resist valve float at high RPM. The triple groove configuration provides enhanced retention and stability when paired with compatible valve locks and springs.

Each valve is precision-machined to exacting tolerances, ensuring consistent sealing and long service life under the extreme conditions of racing. The Race Flo valve head profile is optimized to improve airflow into the combustion chamber, contributing to better throttle response and power delivery.

Installation & Fitment:

These intake valves are direct replacements for the factory valves in 2003–2008 5.7L Gen III HEMI engines. Installation requires standard valvetrain disassembly and reassembly procedures. No modifications to the cylinder head or valvetrain components are necessary when used with compatible springs and retainers designed for race applications.

• Direct fitment for 5.7L Gen III HEMI engines (2003–2008)
• Compatible with high-performance valve springs and retainers
• No cutting, drilling, or special tuning required

What’s Included

• Set of 8 Manley 2.020 Triple Groove Race Flo Hollow Stem Intake Valves

Ideal For:

• Bracket racers and drag racing enthusiasts building high-RPM 5.7L HEMI engines
• Oval track racers requiring durable, lightweight valvetrain components
• Performance engine builders upgrading intake valves for improved airflow and reliability
• Motorsport applications operating up to 8,000 RPM

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.