Description

Manley Performance Race Master Exhaust Valves

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

Part #: 11665-8

Manley Performance Race Master Exhaust Valves are precision-engineered for Chrysler 5.7L HEMI engines produced from 2003 through 2008. Designed to meet the rigorous demands of bracket racing, drag racing, and oval track competition, these valves deliver exceptional durability and consistent performance at engine speeds up to 8,000 RPM. Whether you are rebuilding a race-prepped engine or upgrading for improved exhaust flow and valve longevity, Manley’s Race Master valves provide the reliability and strength essential for high-performance applications.

Built to withstand extreme heat and mechanical stress, these valves help maintain optimal engine efficiency and power output under the toughest racing conditions. They are an ideal choice for racers and performance enthusiasts seeking a direct-fit, high-quality exhaust valve solution for their Chrysler HEMI 5.7L engines.

Key Features

Manley Race Master Exhaust Valves incorporate advanced design and manufacturing techniques tailored for serious racers and performance builders. Key features include:

• Triple groove 1.555-inch valve stem design for enhanced retention and stability at high RPMs
• Constructed from high-strength materials engineered to resist wear, heat, and valve face recession common in racing environments
• Optimized fitment for Chrysler 5.7L HEMI engines from 2003 to 2008, ensuring precise compatibility
• Engineered to support reliable operation up to 8,000 RPM, ideal for bracket, drag, and oval track racing
• Manufactured with tight tolerances to promote consistent valve seating and efficient exhaust flow
• Complete set of 8 valves included for all cylinders

Construction & Design

Manley’s Race Master valves feature a robust construction designed specifically for high-performance exhaust applications. The triple groove stem enhances valve guide retention, reducing the risk of valve float or misalignment during high-RPM operation. Precision machining from premium, heat-resistant materials ensures these valves withstand the intense thermal and mechanical stresses encountered in racing.

The 1.555-inch stem diameter strikes a balance between durability and smooth valve train operation, contributing to improved stability and longevity. These valves maintain optimal sealing and exhaust flow characteristics, which are critical for maximizing power and efficiency in demanding motorsports environments.

Installation & Fitment

These exhaust valves are direct replacements for factory components in Chrysler 5.7L HEMI engines built from 2003 to 2008. They fit standard valve guides and seats designed for this engine family, allowing straightforward installation by experienced engine builders and machinists. Proper valve job and seat preparation are recommended to ensure optimal sealing and performance.

No modifications to the cylinder head or valve train are required when installing these valves, provided the engine falls within the specified application range. These valves are intended for use in performance or race engines and should be installed by professionals familiar with high-performance valvetrain assembly.

What’s Included

• Set of 8 Manley Race Master Exhaust Valves with triple groove 1.555-inch stems

Ideal For

• Bracket racers seeking durable, high-RPM exhaust valves
• Drag racers requiring reliable valve performance up to 8,000 RPM
• Oval track racers upgrading Chrysler 5.7L HEMI valvetrain components
• Engine builders focused on race-prepped Chrysler 5.7L HEMI engines (2003–2008)
• Performance enthusiasts aiming for improved exhaust flow and valve durability

Fitment Summary

These valves fit the following vehicles equipped with the 5.7L HEMI engine:

• 2003–2008 Chrysler 300, Chrysler 300C
• 2003–2008 Dodge Challenger, Dodge Charger, Dodge Dakota, Dodge Durango, Dodge Magnum, Dodge Ram 1500
• 2003–2008 Jeep Commander, Jeep Grand Cherokee, Jeep Wagoneer
• 2011–2025 Ram 1500, Ram 2500, Ram 3500