DSS Racing FX Series Forged Piston Set

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

1-6700-3937 / 2-6700-3937 / 3-6700-3937 / K1-6700-3937 / K2-6700-3937 / K3-6700-3937

Overview:

The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and builders seeking reliable, high-performance components for their 5.7L Hemi engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram models equipped with the 5.7L Hemi, this piston set is ideal for stroker builds and performance upgrades. With a focus on durability and precision, these pistons help maximize engine efficiency and power potential while maintaining OEM fitment standards.

Whether you are rebuilding your engine for street performance or mild racing applications, the DSS Racing FX Series pistons offer a robust solution that balances strength and weight for improved engine response and longevity.

Key Features:

These forged pistons incorporate advanced design elements to meet the demands of high-performance 5.7L Hemi engines:

• Compatible with 394 Small Block Mopar Hemi Gen III engines
• FX Series forged construction for enhanced strength and durability
• Compression height of 1.09" optimized for stroker applications
• 1.5cc flat top piston design for precise combustion chamber volume control
• .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
• Designed for a 4.050" stroke and 6.125" connecting rods
• Available in multiple combustion chamber volumes for varied compression ratios: 65cc (approx. 11.75:1), 74cc (approx. 10.62:1), and 85cc (approx. 9.49:1)
• Precision machining ensures consistent fit and performance

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent strength-to-weight ratio essential for performance engines. The forging process enhances the metal’s grain structure, resulting in pistons that resist cracking and deformation under high stress and temperature conditions. The flat-top design with a slight dish (-1.5cc) optimizes combustion efficiency and helps control detonation in boosted or naturally aspirated setups.

Each piston features carefully engineered ring grooves to accommodate modern ring packages, ensuring effective sealing and oil control. The wrist pin options allow builders to select either full-floating or press-fit configurations based on their engine setup and durability requirements.

Installation & Fitment:

These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, particularly those utilizing the Gen III Small Block Mopar Hemi platform. Installation requires standard engine assembly procedures, with attention to proper ring end gap and wrist pin installation depending on the chosen pin type. No major modifications to the block or rods are typically necessary, making these pistons a straightforward upgrade for stroker builds or engine rebuilds.

What's Included:

• Set of 8 forged pistons (one per cylinder)
• Wrist pins (full-floating or press-fit, depending on SKU)
• Optional retaining clips for wrist pins

Ideal For:

This piston set is ideal for engine builders, performance enthusiasts, and professional shops upgrading or rebuilding 5.7L Hemi engines for increased displacement and power. It suits applications ranging from street performance to mild racing, where durability and precise combustion chamber control are critical. The multiple compression ratio options allow customization based on fuel type, boost levels, and tuning goals.

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.