DSS Racing FX Series Forged Piston Set 3.937″ Bore: Fits Chrysler / Dodge / Jeep / Ram 5.7L Hemi

Description

DSS Racing FX Series Forged Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models

1-6723-3937 / 2-6723-3937 / 3-6723-3937 / K1-6723-3937 / K2-6723-3937 / K3-6723-3937

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Hemi engine. Designed to meet the demands of high-performance and rebuild applications, these pistons offer exceptional strength and durability. Whether you are upgrading your engine for increased power or replacing worn components, this piston set provides a reliable foundation for enhanced engine performance.

Built to exacting standards, the FX Series pistons feature a forged construction that withstands high combustion pressures and temperatures. Their design supports both full-floating and press-fit wrist pins, accommodating various engine builds and preferences. With a bore size of 3.937 inches and a stroke of 3.578 inches, these pistons maintain optimal geometry for the 348 Small Block Mopar Hemi Gen III platform.

Key Features:

These DSS Racing pistons incorporate advanced design elements to ensure performance and longevity:

• Forged construction for superior strength and resistance to heat and stress
• FX Series comp height of 1.21 inches for precise piston-to-deck clearance
• 12cc dish top design to optimize combustion chamber volume and compression ratio
• .945-inch wrist pin diameter compatible with full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm for reliable ring sealing and reduced friction
• Designed for a 3.578-inch stroke and 6.243-inch connecting rod length
• Available in multiple dish volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.38:1 down to 7.79:1
• Precision manufacturing ensures consistent fitment and performance across all pistons in the set

Construction & Design:

The FX Series pistons are crafted from high-grade forged aluminum alloy, delivering an ideal balance of lightweight strength and thermal conductivity. This material choice helps reduce reciprocating mass, improving engine response and durability under demanding conditions. The pistons feature a dish top design with a -12cc volume to optimize combustion efficiency and reduce the risk of detonation in boosted or high-compression setups.

Each piston is machined with tight tolerances to ensure proper ring groove dimensions and wrist pin fitment. The option for full-floating or press-fit wrist pins allows builders to customize the assembly based on engine use and performance goals. The robust design accommodates the 3.937-inch bore size common to many Mopar 5.7L Hemi rebuilds and upgrades.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the 348 Small Block Mopar Hemi Gen III platform. Installation requires standard engine rebuilding procedures, including proper honing of the cylinder bores and careful measurement of piston-to-wall clearance. The pistons are compatible with the factory stroke of 3.578 inches and connecting rod length of 6.243 inches, ensuring straightforward integration into stock or modified bottom ends.

Builders should verify compression ratio requirements and select the appropriate piston dish volume to match their cylinder head combustion chamber size and gasket thickness. Professional installation is recommended to achieve optimal engine performance and reliability.

What’s Included:

• Set of forged FX Series pistons (quantity as required for engine rebuild)
• Wrist pins compatible with full-floating or press-fit installation
• Detailed specifications for bore size, stroke, and ring groove dimensions

Ideal For:

This piston set is ideal for automotive enthusiasts, engine builders, and professional shops working on Chrysler, Dodge, Jeep, or Ram 5.7L Hemi engines. It suits applications ranging from street performance upgrades to motorsport and high-output rebuilds where durability and precision are critical. Whether restoring a worn engine or building a high-performance powerplant, these pistons provide a reliable foundation for enhanced combustion and power delivery.