DSS Racing FX Series Forged Piston Set

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

1-6700-3947 / 2-6700-3947 / 3-6700-3947 / K1-6700-3947 / K2-6700-3947 / K3-6700-3947

Overview:

The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and professional builders seeking enhanced durability and performance for their 5.7L Hemi engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi models, this piston set is ideal for stroker builds and high-performance applications. Whether you are upgrading for increased power output or building a reliable stroker engine, these pistons provide the strength and precision needed for demanding conditions.

With a compact flat-top design and carefully calculated compression ratios, these pistons help optimize combustion efficiency and power delivery. They are a perfect choice for those looking to improve engine longevity while maintaining factory-like fitment and compatibility.

Key Features:

These forged pistons incorporate advanced design elements and high-quality materials to meet the rigorous demands of performance engines:

• Compatible with 396 Small Block Mopar Hemi Gen III FX engines
• Comp height of 1.09 inches for precise deck clearance
• 1.5cc flat-top piston design to optimize combustion chamber volume
• .927-inch wrist pin diameter with options for full-floating or press-fit pins
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring
• Stroke length of 4.050 inches and connecting rod length of 6.125 inches
• Available compression ratios approximately 11.81:1 (65cc), 10.65:1 (74cc), and 9.53:1 (85cc)
• Forged construction for superior strength and resistance to high stress
• Designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines without modification

Construction & Design:

Each piston in the DSS Racing FX Series set is crafted from premium forged aluminum alloy, providing exceptional strength-to-weight ratio and durability under extreme conditions. The forging process enhances the metal grain structure, resulting in pistons that resist cracking, scuffing, and deformation even at elevated temperatures and high RPMs.

The flat-top design with a -1.5cc volume allows for fine-tuning of compression ratios to suit various performance goals, from street performance to track applications. The pistons feature precision-machined ring grooves and wrist pin bores to ensure optimal sealing and smooth articulation with the connecting rods.

Installation & Fitment:

This piston set is designed for straightforward installation in most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, particularly those utilizing the Gen III FX series small block configuration. The pistons accommodate either full-floating or press-fit wrist pins, providing flexibility depending on builder preference and application requirements.

While these pistons fit a wide range of 5.7L Hemi models, professional installation and proper engine blueprinting are recommended to achieve ideal piston-to-cylinder wall clearance and ring end gaps. No major modifications are typically required, making this set a direct upgrade for stroker builds and performance rebuilds.

What's Included:

• Set of forged pistons (quantity as required for engine configuration)
• Wrist pins (full-floating or press-fit options depending on SKU)
• Retaining clips for wrist pins

Ideal For:

This piston set is perfect for engine builders, performance enthusiasts, and racers upgrading or rebuilding their 5.7L Hemi engines. It suits stroker engine projects, high-compression builds, and applications demanding enhanced durability and reliability under increased power and RPM conditions. Whether for street, strip, or off-road use, these pistons offer a solid foundation for improved engine performance 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.