DSS Racing FX Series Forged Piston Set

Fits Chrysler / Dodge / Jeep / Ram 6.2L Hellcat & 6.4L 392 Models

1-6816-4125 / 2-6816-4125 / 3-6816-4125 / K1-6816-4125 / K2-6816-4125 / K3-6816-4125

Overview:

The DSS Racing FX Series Forged Piston Set is engineered for high-performance applications in Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.2L Hellcat and 6.4L 392 engines. Designed to handle the extreme demands of boosted and naturally aspirated setups, these pistons offer enhanced strength and durability over stock components. Ideal for enthusiasts and professional builders seeking reliable, race-ready pistons that maintain OEM compatibility while delivering superior performance.

These pistons are specifically crafted for the 433 Small Block Mopar Hemi Gen III platform, featuring a 4.125" bore size and a compact 1.12" compression height. Their design supports both full-floating and press-fit wrist pins, providing flexibility for various engine builds.

Key Features:

The DSS Racing FX Series Forged Pistons combine advanced engineering with precision manufacturing to meet the rigorous demands of high-output Mopar engines. Key features include:

• Forged from high-strength aluminum alloy for maximum durability and heat resistance
• 4.125" bore diameter optimized for 6.2L Hellcat and 6.4L 392 engine blocks
• Compact 1.12" compression height for improved piston-to-cylinder clearance
• 23cc dish top design to control compression ratio and support forced induction
• Ring groove dimensions of 1.2mm/1.2mm/3mm for reliable ring sealing and reduced friction
• Compatible with both full-floating and press-fit wrist pins (.927" pin diameter)
• Stroke compatibility of 4.050" and connecting rod length of 6.125" for balanced engine geometry
• Available in multiple dish volumes (65cc, 74cc, 85cc) to tailor compression ratios from 10.17:1 down to 8.6:1
• Precision CNC machining ensures tight tolerances and consistent performance

Construction & Design:

Each piston in the FX Series is forged from premium-grade aluminum alloy, delivering exceptional strength-to-weight ratio and thermal conductivity. The forging process enhances grain structure, resulting in pistons that resist cracking and deformation under high cylinder pressures and temperatures. The dish top design reduces compression ratio to accommodate boost levels typical of Hellcat and 392 engine builds, while maintaining efficient combustion chamber dynamics.

The pistons feature a carefully engineered ring groove profile to optimize ring seal and minimize blow-by, contributing to improved engine efficiency and longevity. The wrist pin bore supports either full-floating or press-fit configurations, allowing builders to customize assembly based on application requirements. Overall, the design balances durability, weight savings, and compatibility with factory components.

Installation & Fitment:

The DSS Racing FX Series Forged Pistons are direct fit replacements for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and 6.4L 392 engines. Installation requires standard engine rebuild procedures, including proper honing and cleaning of the cylinder bores. These pistons are compatible with the stock stroke of 4.050" and connecting rod length of 6.125", ensuring seamless integration with existing rotating assemblies.

Builders should verify ring end gaps and wrist pin fitment during assembly. No major modifications to the engine block or components are typically necessary, making these pistons an excellent upgrade for performance builds ranging from street to track applications.

What's Included:

• Set of forged pistons (quantity as per kit selection)
• Wrist pins compatible with full-floating or press-fit installation
• Precision-machined piston rings (1.2mm top and second rings, 3mm oil ring)
• Installation instructions and technical specifications

Ideal For:

This piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding Chrysler, Dodge, Jeep, and Ram vehicles powered by the 6.2L Hellcat or 6.4L 392 engines. Whether building a boosted street machine, a track-focused race car, or a high-output naturally aspirated engine, these pistons provide the strength, reliability, and precision needed to maximize power and durability.

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.