DSS Racing FX Series Forged Pistons

Fits Chrysler, Dodge, Jeep, Ram 6.2L Hellcat, 6.4L 392 & Trackhawk Gen III Hemi Engines

1-6817-4100 / 2-6817-4100 / 3-6817-4100 / K1-6817-4100 / K2-6817-4100 / K3-6817-4100

Overview:

The DSS Racing FX Series Forged Pistons are precision-engineered performance components designed specifically for most Chrysler, Dodge, Jeep, and Ram Gen III Hemi engines, including the 6.2L Hellcat, 6.4L 392, and Trackhawk variants. Built to handle the extreme demands of high-performance and forced induction applications, these pistons provide enhanced strength, durability, and reliability over stock cast pistons.

With a 4.100" bore size and a +4cc dome top, these pistons optimize combustion chamber volume and compression ratios, making them ideal for enthusiasts seeking to maximize power output while maintaining engine longevity. Whether you are building a street performance engine or a race-ready powerplant, the DSS Racing FX Series pistons deliver consistent quality and performance.

Key Features:

These forged pistons incorporate advanced design features to meet the rigorous needs of modern Hemi engines:

• Forged 428 Small Block Mopar Hemi Gen III construction for superior strength
• +4cc dome top design to increase compression and optimize combustion
• Compact pin diameter of .927" for reduced reciprocating mass
• Available in full-floating or press-fit wrist pin configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm for reliable ring sealing
• Compatible with a 4.050" stroke and 6.125" connecting rods
• Compression height of 1.12" for precise piston-to-deck clearance
• Designed to support a range of combustion chamber volumes (65cc, 74cc, 85cc) with corresponding compression ratios

Construction & Design:

DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an optimal balance of lightweight strength and thermal conductivity. The forging process enhances the metal grain structure, resulting in pistons that resist cracking, scuffing, and deformation under high cylinder pressures and temperatures.

The +4cc dome top is precision-machined to ensure consistent combustion chamber volume and promote efficient flame propagation. The pistons feature tight tolerances and carefully engineered ring grooves to maintain excellent ring seal and reduce blow-by. The option for full-floating or press-fit wrist pins allows builders to tailor the assembly to their specific application and durability requirements.

Installation & Fitment:

These pistons are designed to fit most Chrysler, Dodge, Jeep, and Ram Gen III Hemi engines with 6.2L Hellcat, 6.4L 392, and Trackhawk configurations. Installation requires standard engine assembly procedures, including proper ring end gap setting and wrist pin installation based on the chosen configuration. No major modifications to the block or rods are typically necessary, making these pistons a direct upgrade for performance builds.

Builders should verify bore size and rod length compatibility (4.100" bore, 6.125" rod) to ensure proper fitment and piston-to-valve clearance. The pistons accommodate a 4.050" stroke, matching common crankshaft specifications for these engines.

What's Included:

• Set of forged DSS Racing FX Series pistons (quantity as per SKU selection)
• Wrist pins (full-floating or press-fit depending on configuration)
• Retaining clips for wrist pins

Ideal For:

These pistons are ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram Gen III Hemi engines. They are especially suited for applications involving forced induction, high compression naturally aspirated builds, and those requiring enhanced durability and strength over OEM pistons. Whether upgrading a Hellcat, 392 Hemi, or Trackhawk engine, these pistons provide a reliable foundation for increased horsepower and torque.

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.