DSS Racing FX Series Forged Piston Set

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

1-6723-3947 / 2-6723-3947 / 3-6723-3947 / K1-6723-3947 / K2-6723-3947 / K3-6723-3947

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for the 5.7L Small Block Mopar Gen III Hemi engines found in many Chrysler, Dodge, Jeep, and Ram vehicles. Designed to deliver superior strength and durability, these pistons are ideal for enthusiasts and professional builders seeking to enhance engine reliability and performance under demanding conditions.

Featuring a forged construction and precision machining, this piston set offers improved resistance to heat and stress compared to stock cast pistons. Whether you are building a high-performance street engine or a race-ready powerplant, the DSS Racing FX Series pistons provide the foundation for consistent power delivery and long-term engine health.

Key Features:

These pistons incorporate advanced design elements to optimize performance and fitment for the 5.7L Hemi platform:

• Forged construction for maximum strength and durability
• Comp Height: 1.21 inches for precise compression control
• 12cc dish top design to optimize combustion chamber volume
• Pin diameter of .945 inches, compatible with full-floating or press-fit configurations
• Ring groove dimensions: 1.2mm top and second grooves, 3mm oil ring groove
• Stroke compatibility: 3.578 inches
• Connecting rod length: 6.243 inches
• Available in multiple compression ratios approximately 9.43:1 (65cc), 8.62:1 (74cc), and 7.83:1 (85cc)
• Precision engineered to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight strength and thermal conductivity. The forging process enhances the metal grain structure, resulting in pistons that resist cracking and deformation under extreme heat and pressure.

The pistons feature a carefully designed dish top with a 12cc volume reduction to optimize combustion efficiency and control compression ratios. The pin bore is engineered for compatibility with both full-floating and press-fit wrist pins, allowing flexibility in engine assembly preferences. Ring grooves are precision-machined to accommodate high-performance piston rings, ensuring effective sealing and oil control.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Small Block Mopar Gen III Hemi engine. Installation requires standard engine rebuild procedures, including proper ring end gap setting and wrist pin installation. The pistons are compatible with a 3.578-inch stroke crankshaft and 6.243-inch connecting rods, matching OEM specifications for seamless integration.

Due to the forged construction and precise dimensions, these pistons are ideal for both OEM replacement and performance builds. No major modifications are typically required, but professional installation is recommended to ensure optimal engine performance and longevity.

What's Included:

• Set of forged pistons for 5.7L Small Block Mopar Gen III Hemi
• Compatible wrist pin options (full-floating or press-fit)
• Precision-machined ring grooves for high-performance piston rings
• Technical specifications and installation guidelines

Ideal For:

This piston set is perfect for automotive enthusiasts, engine builders, and racers who demand enhanced durability and performance from their 5.7L Hemi engines. Whether upgrading a street vehicle for improved reliability or building a high-output race engine, the DSS Racing FX Series pistons provide a robust foundation for power and longevity.

DSS Racing — Founded in 1983 originally as Danny’s Speed Shop, DSS Racing has grown from a small Midwest performance engine shop into a respected name in forged engine components for the high-performance and racing markets. Based in St. Charles, Illinois, DSS is best known for its forged pistons and machined engine parts made in the USA that have been used in championship engines and thousands of builds, blending old-school racing roots with precision manufacturing for enthusiasts and racers alike.