DSS Racing FX Series Forged Pistons

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

1-6810-4125 / 2-6810-4125 / 3-6810-4125 / K1-6810-4125 / K2-6810-4125 / K3-6810-4125

Overview:

The DSS Racing FX Series Forged Pistons are precision-engineered performance components designed specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.2L Hellcat and 6.4L 392 engines. These pistons are ideal for enthusiasts and professional builders seeking durable, high-strength pistons capable of handling increased power and demanding driving conditions. Crafted to exacting specifications, they provide excellent reliability and performance for both street and track applications.

With a 4.125" bore size and compatibility with most 6.2L Hellcat and 6.4L 392 models, these pistons offer a direct fit solution that supports engine builds requiring forged internals. They are engineered to maintain optimal compression ratios and combustion efficiency, enhancing overall engine performance and longevity.

Key Features:

Designed for high-performance Mopar HEMI engines, the DSS Racing FX Series Forged Pistons deliver a blend of strength, precision, and reliability. Key features include:

• Forged 4330 alloy construction for superior strength and durability
• Compensated piston height of 1.12" for optimal deck clearance
• 1.5cc flat top design to support various combustion chamber volumes
• .927" wrist pin diameter with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
• Compatible with 4.050" stroke and 6.125" connecting rods
• Available in multiple combustion chamber volume options: 65cc, 74cc, and 85cc
• Approximate compression ratios ranging from 10.27:1 to 12.72:1 depending on chamber volume
• Precision CNC machining ensures tight tolerances and consistent performance

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-grade 4330 forged steel alloy, known for its exceptional strength-to-weight ratio and resistance to thermal and mechanical stress. This material choice ensures the pistons can withstand the extreme pressures and temperatures generated by high-output Hellcat and 392 engines.

Each piston features a flat top design with a slight volume offset (-1.5cc) to optimize combustion efficiency and support various compression ratios. The wrist pin bore is engineered for either full-floating or press-fit installation, providing flexibility based on engine build preferences. Ring grooves are precisely cut to accommodate high-performance piston rings, ensuring excellent sealing and reduced blow-by.

Installation & Fitment:

These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and 6.4L 392 engines, making installation straightforward for experienced engine builders. Proper engine assembly practices should be followed, including checking clearances and ring end gaps. Depending on the wrist pin configuration chosen, either full-floating or press-fit installation methods will be required.

Due to the precision engineering and OEM compatibility, these pistons fit seamlessly into existing engine blocks without the need for extensive modifications, making them an excellent choice for performance upgrades or rebuilds.

What's Included:

• Set of forged pistons with 4.125" bore size
• Wrist pins (.927") compatible with full-floating or press-fit installation
• Detailed specifications for combustion chamber volume and compression ratios

Ideal For:

These DSS Racing FX Series Forged Pistons are ideal for:

• Performance enthusiasts upgrading their Hellcat or 392 engines
• Engine builders seeking durable forged pistons for high-boost or high-horsepower applications
• Track and street performance vehicles requiring reliable, high-strength internals
• Rebuild projects aiming to restore or enhance engine durability and efficiency

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.