DSS Racing FX Series Forged Piston Set

Chrysler / Dodge / Jeep / Ram 6.4L 392 / 6.2L Hellcat & Trackhawk

1-6811-4100 / 2-6811-4100 / 3-6811-4100 / K1-6811-4100 / K2-6811-4100 / K3-6811-4100

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for Mopar Gen III Hemi 6.2L and 6.4L Hellcat and Trackhawk engines. Designed to accommodate a 4.100" bore, these pistons deliver exceptional strength and durability for high-performance applications. Whether you're building a street machine or a track-ready powerhouse, this piston set offers the reliability and precision needed to handle increased power and boost levels.

These pistons feature a compact dish top design with a -7cc volume, optimized for efficient combustion and improved compression ratios. The set is ideal for enthusiasts and professional builders seeking to upgrade their engine internals with components that maintain factory dimensions while enhancing performance potential.

Key Features:

Built to meet the demands of high-output Mopar engines, the DSS Racing FX Series pistons include several advanced features:

• Forged construction for superior strength and fatigue resistance
• 4.100" bore size compatible with Mopar Gen III Hemi 6.2L and 6.4L engines
• Compact dish top with -7cc volume for optimized combustion chamber dynamics
• Pin diameter of .927" supporting full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
• Compatible with a 4.050" stroke and 6.125" connecting rod length
• Approximate compression ratios ranging from 9.71:1 to 11.87:1 depending on combustion chamber volume
• Designed for 428 Small Block Mopar Hemi Gen III applications

Construction & Design:

The FX Series pistons are crafted from high-grade forged aluminum alloy, providing an optimal balance of lightweight design and exceptional strength. The forging process enhances grain structure, resulting in improved resistance to thermal and mechanical stress. The pistons feature a precision-machined dish top with a -7cc volume to fine-tune compression ratios and promote efficient combustion.

Each piston is engineered with a .927" pin bore that supports either full-floating or press-fit wrist pins, allowing flexibility in assembly based on engine build preferences. The ring grooves are carefully cut to accommodate 1.2mm top and second rings with a 3mm oil ring, ensuring effective sealing and oil control under demanding conditions.

Installation & Fitment:

This piston set is designed as a direct fit for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.4L 392 or 6.2L Hellcat and Trackhawk engines. Installation requires standard engine assembly procedures and may involve balancing and blueprinting for optimal performance. No major modifications to the block or rotating assembly are typically necessary, making these pistons an excellent upgrade for both rebuilds and performance builds.

What's Included:

• Set of forged aluminum pistons (quantity as required for engine configuration)
• Specifications for pin size, ring groove dimensions, and compression ratios

Ideal For:

This piston set is ideal for performance enthusiasts, engine builders, and racers who demand durable, high-quality components for Mopar Gen III Hemi engines. Whether upgrading a Hellcat or Trackhawk for street, strip, or track use, these pistons provide the strength and precision needed to support increased power levels and boost pressures while maintaining reliable operation.

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.