Manley Performance Piston Ring Set

2005–2008 Chrysler 300C, 2005–2007 Dodge Magnum, 2006–2008 Dodge Charger, 2006–2008 Jeep Grand Cherokee 5.7L / 6.1L HEMI / SRT8

Part #: 46120-8

Overview

The Manley Ductile Iron File Fit Piston Ring Set is engineered to deliver a precise and durable seal for high-performance Chrysler, Dodge, and Jeep engines. Designed specifically for 3.917-inch bore applications, this ring set is ideal for 5.7L and 6.1L HEMI and SRT8 engines found in popular models such as the Chrysler 300C, Dodge Magnum, Dodge Charger, and Jeep Grand Cherokee. Whether you are rebuilding or upgrading your engine, these piston rings ensure optimal compression and reduced blow-by for improved engine efficiency and longevity.

Manley Performance’s piston rings are crafted for enthusiasts and professional engine builders who demand reliability and consistent performance under demanding conditions. The file fit design allows for custom fitting to exact bore specifications, ensuring a perfect match and superior sealing capability.

Key Features

Manley Performance piston rings combine advanced materials and precision engineering to meet the needs of high-output engines. Key features include:

• File fit design for precise bore matching and optimal sealing
• Ductile iron construction for enhanced strength and wear resistance
• Compatible with 3.917-inch bore diameters, tailored for specific Chrysler, Dodge, and Jeep engines
• Designed for 5.7L HEMI and 6.1L SRT8 engines, ensuring perfect fitment and performance
• Includes top and second rings engineered for reduced friction and improved durability
• Plasma-Moly inlay options available for enhanced wear resistance (depending on specific ring type)
• Napier-style second rings for improved oil control and reduced blow-by
• Manufactured to meet or exceed OEM specifications for reliable operation
• Ideal for performance rebuilds, street, and mild racing applications

Construction & Design

The piston rings are constructed from high-grade ductile iron, chosen for its excellent combination of toughness and wear resistance. This material withstands the high pressures and temperatures inside the combustion chamber while maintaining ring integrity over extended use. The file fit approach allows engine builders to hand-fit each ring to the cylinder bore, ensuring a precise gap and perfect ring-to-bore contact.

Manley’s use of advanced manufacturing techniques ensures consistent ring thickness and roundness, critical for maintaining compression and minimizing oil consumption. The inclusion of Napier-style second rings enhances oil scraping efficiency, reducing oil consumption and improving overall engine cleanliness.

Installation & Fitment

Installation requires careful measurement and fitting of the piston rings to the cylinder bore. The file fit design means these rings are supplied slightly oversized and must be carefully filed to achieve the correct end gap for your specific bore size. This process ensures a custom fit that maximizes sealing and performance. These rings are compatible with the following vehicles and engines:

• 2005–2008 Chrysler 300C 5.7L HEMI
• 2005–2007 Chrysler 300C 6.1L SRT8
• 2005–2008 Dodge Magnum 5.7L HEMI
• 2006–2008 Dodge Charger 5.7L HEMI
• 2006–2007 Dodge Charger 6.1L SRT8
• 2006–2008 Dodge Magnum 6.1L SRT8
• 2006–2008 Jeep Grand Cherokee 6.1L SRT8

Professional installation is recommended to ensure proper ring gap setting and to avoid damage during fitting.

What's Included

• Complete set of ductile iron piston rings for 3.917-inch bore
• Top compression rings
• Napier-style second rings
• File fit rings ready for custom gap adjustment

Ideal For

This piston ring set is ideal for engine builders, performance enthusiasts, and professional mechanics working on Chrysler 5.7L and 6.1L HEMI and SRT8 engines. Whether performing a high-performance rebuild, restoring a muscle car, or upgrading a street engine, these rings provide the durability and sealing performance necessary for reliable power and longevity.

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.