DSS Racing FX Series Forged Piston Set

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

1-6703-3947 / 2-6703-3947 / 3-6703-3947 / K1-6703-3947 / K2-6703-3947 / K3-6703-3947

Overview:

The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered to enhance the performance and durability of your 5.7L Hemi engine. Designed specifically for Chrysler, Dodge, Jeep, and Ram models equipped with the 5.7L Hemi, this piston set is ideal for enthusiasts looking to upgrade their engine’s strength and reliability while maintaining factory compatibility.

These forged pistons are built to withstand the increased stresses of stroker builds and high-performance applications, providing improved combustion efficiency and longevity. Whether you’re rebuilding your engine or upgrading for more power, this piston set offers a precision fit and superior construction to meet demanding conditions.

Key Features:

Designed with advanced engineering and high-quality materials, the DSS Racing FX Series Forged Piston Set delivers exceptional performance benefits:

• Compatible with 396 Small Block Mopar Hemi Gen III engines and FX series configurations
• Comp Height of 1.09 inches for optimal piston-to-head clearance
• 12cc dish top design to control compression and reduce detonation risk
• Pin diameter of .927 inches, available in full-floating or press-fit options
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
• Stroke length of 4.050 inches and connecting rod length of 6.125 inches for stroker applications
• Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from 8.72 to 10.54
• Precision forged construction for enhanced strength and durability under high stress

Construction & Design:

Each piston in the DSS Racing FX Series set is forged from premium-grade aluminum alloy, ensuring a lightweight yet robust component capable of handling increased cylinder pressures and temperatures. The forged design improves fatigue resistance and reduces the risk of cracking or failure during high-performance operation.

The pistons feature a carefully engineered dish top with a -12cc volume to optimize combustion chamber shape and control compression ratios. The ring grooves are machined to exact specifications, accommodating high-quality piston rings that provide excellent sealing and oil control. The option for full-floating or press-fit wrist pins allows customization based on engine build preferences.

Installation & Fitment:

This piston set is designed to fit 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 rebuild procedures, and the pistons are compatible with existing cylinder bores when properly sized. No major modifications are typically necessary, making this an efficient upgrade for stroker builds and performance enhancements.

What's Included:

• Set of 8 forged pistons
• Wrist pins (full-floating or press-fit options)
• Piston rings (1.2mm top and second rings, 3mm oil rings)
• Installation instructions and specifications

Ideal For:

This piston set is ideal for automotive enthusiasts, engine builders, and performance tuners seeking to upgrade or rebuild their 5.7L Hemi engines with reliable, high-strength components. It is especially suited for stroker engine builds, high-performance street vehicles, and light racing applications where durability and precision are critical.

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.