DSS Racing FX Series Forged Piston Set

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

1-6706-3947 / 2-6706-3947 / 3-6706-3947 / K1-6706-3947 / K2-6706-3947 / K3-6706-3947

Overview:

The DSS Racing 5.7L Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and builders seeking enhanced durability and performance for their Chrysler, Dodge, Jeep, or Ram 5.7L Hemi engines. Designed to accommodate stroker builds with a 4.050" stroke and optimized compression ratios, these pistons provide a reliable foundation for high-output applications while maintaining compatibility with most factory configurations.

Whether you are upgrading your engine for street performance, racing, or heavy-duty use, this piston set offers the strength and precision needed to handle increased power and stress without compromising engine longevity.

Key Features:

These forged pistons incorporate advanced design elements to ensure superior performance and reliability:

• Compatible with 396 Small Block Mopar Hemi Gen III engines
• FX Series forged construction for enhanced strength and durability
• Comp height of 1.09" for optimal piston-to-head clearance
• 23cc dish top design to control compression and combustion characteristics
• .927" piston pin diameter with options for full-floating or press-fit installation
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
• Designed for a 4.050" stroke and 6.125" connecting rod length
• Available in multiple dish volumes to achieve approximate compression ratios ranging from 7.99 to 9.45
• Precision machining ensures consistent fitment and performance

Construction & Design:

Manufactured from high-grade forged aluminum alloy, these pistons are built to withstand the rigors of high-performance and stroker engine builds. The forging process enhances the metal’s grain structure, resulting in superior strength and resistance to cracking or deformation under extreme conditions.

The dish top design helps manage compression ratios effectively, allowing tuners to optimize combustion for various fuel types and performance goals. The piston pin bore supports either full-floating or press-fit pins, providing flexibility depending on engine build preferences.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines equipped with the Gen III small block configuration. Installation typically requires standard engine assembly procedures, with attention to piston ring end gaps and pin fitment based on the chosen pin style.

Due to the stroker stroke length of 4.050" and the specific rod length of 6.125", builders should verify compatibility with their rotating assembly and clearances within the engine block. These pistons are ideal for custom builds and performance upgrades where increased displacement and compression tuning are desired.

What's Included:

• Set of forged pistons (quantity as required for engine)
• Piston pins (full-floating or press-fit options depending on SKU)
• Piston rings sized to match ring grooves (1.2/1.2/3mm)
• Installation instructions and technical specifications

Ideal For:

This piston set is perfect for engine builders and performance enthusiasts who are upgrading or rebuilding their 5.7L Hemi engines with stroker configurations. It suits applications ranging from street performance and muscle cars to off-road and racing vehicles requiring enhanced strength and tailored compression ratios.

Whether you are increasing displacement for more torque or optimizing compression for forced induction or naturally aspirated setups, these DSS Racing forged pistons provide a reliable and high-quality solution.

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.