DSS Racing FX Series Gen III Hemi Forged Piston Set

Chrysler / Dodge / Jeep / Ram 5.7L Hemi

1-6710-3927 / 2-6710-3927 / 3-6710-3927 / K1-6710-3927 / K2-6710-3927 / K3-6710-3927

Overview:

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

Built to fit the 347 Small Block Mopar Hemi Gen III platform, these pistons feature a compact design with a 1.21" compression height and a -1.5cc flat top, optimizing combustion chamber volume for improved performance. The set supports both full-floating and press-fit wrist pins, accommodating various engine configurations and preferences.

Key Features:

These forged pistons incorporate advanced design elements and precision manufacturing to deliver superior performance and reliability:

• Compatible with Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines
• Forged construction for enhanced strength and durability under high stress
• Compression height of 1.21" for optimal piston-to-deck clearance
• 1.5cc flat top design to fine-tune compression ratios
• .927" wrist pin diameter with options for full-floating or press-fit pins
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
• Stroke compatibility of 3.578" and connecting rod length of 6.243"
• Approximate compression ratios available: 65cc (10.49:1), 74cc (9.47:1), and 85cc (8.49:1)
• Precision machining ensures consistent fitment and performance

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight construction and exceptional strength. Forging enhances the metal grain structure, resulting in pistons that resist cracking and deformation under extreme combustion pressures and temperatures. The flat-top design with a slight volume offset (-1.5cc) allows for precise control over compression ratios, which is critical for tuning performance and fuel requirements.

Each piston is engineered with carefully sized ring grooves to accommodate high-quality piston rings, ensuring optimal sealing and oil control. The wrist pin options—full-floating or press-fit—offer flexibility depending on engine build preferences and intended use. This attention to detail in design and materials makes the FX Series pistons a dependable upgrade for serious Hemi enthusiasts.

Installation & Fitment:

These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi Gen III engines, making installation straightforward for experienced engine builders and professional shops. Proper ring end gap and clearance checks are recommended during assembly to ensure optimal performance and longevity. Depending on the wrist pin choice, installation may require specific tools or techniques to secure the pins correctly.

Because these pistons support multiple compression ratio options, builders can select the ideal piston volume to match their cylinder head combustion chamber size and desired engine characteristics. This versatility helps tailor the build for street, performance, or racing applications.

What's Included:

• Set of forged pistons (quantity as required for engine)
• Wrist pins (full-floating or press-fit, depending on SKU)
• Optional circlips or retaining hardware as applicable

Ideal For:

This piston set is ideal for automotive enthusiasts, engine builders, and performance shops upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 5.7L Hemi engines. It suits applications ranging from high-performance street vehicles to track-focused builds where durability and precise compression control are essential. The FX Series pistons provide a solid foundation for increased horsepower and torque while maintaining reliability under demanding conditions.

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.