DSS Racing FX Series Gen III Hemi Forged Piston Set

Fits Chrysler / Dodge / Jeep / Ram 6.2L Hellcat & Trackhawk Models

1-6860-4100 / 2-6860-4100 / 3-6860-4100 / K1-6860-4100 / K2-6860-4100 / K3-6860-4100

Overview:

The DSS Racing FX Series Gen III Hemi Forged Piston Set is engineered specifically for the demanding performance needs of Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines. Designed to fit a 4.100" bore, these pistons offer a perfect balance of strength, durability, and precision for high-output Hellcat applications. Whether you are rebuilding your engine or upgrading for increased power and reliability, this piston set delivers exceptional quality and performance.

Built to accommodate the 378 Small Block Mopar Hemi Gen III platform, these pistons feature a compact 1.275" compression height and a -1.5cc flat top design, optimizing combustion efficiency and maintaining ideal compression ratios. The set supports both full-floating and press-fit wrist pins, allowing flexibility in assembly preferences.

Key Features:

Designed with advanced engineering and performance in mind, the DSS Racing FX Series pistons include:

• Precision forged construction for superior strength and durability under high stress
• Compatible with 4.100" bore sizes common to Hellcat and Trackhawk engines
• Compression height of 1.275" optimized for Gen III Hemi configurations
• 1.5cc flat top piston crown for improved combustion and power output
• Wrist pin diameter of .927" supporting full-floating or press-fit installation
• Ring groove dimensions of 1.2mm/1.2mm/3mm for reliable sealing and reduced friction
• Stroke compatibility of 3.578" with a 6.2" connecting rod length
• Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from 9.09:1 to 11.23:1
• Engineered specifically for the 6.2L Hellcat and Trackhawk engines to ensure perfect fit and performance

Construction & Design:

The FX Series pistons are crafted from high-grade forged aluminum alloy, providing an ideal combination of lightweight design and exceptional strength. Forging enhances the metal’s grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under extreme boost and high RPM conditions typical of Hellcat powerplants.

The flat top piston design with a slight negative volume (-1.5cc) optimizes combustion chamber dynamics, improving throttle response and power delivery. The ring grooves are precision-machined to accommodate high-performance piston rings, ensuring excellent sealing and minimizing blow-by. The wrist pin options allow builders to choose between full-floating or press-fit configurations based on their engine build preferences.

Installation & Fitment:

This piston set is a direct fit for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines with a 4.100" bore. Installation requires standard engine rebuild procedures and is compatible with the factory stroke of 3.578" and 6.2" connecting rods. No major modifications are necessary, making these pistons an ideal upgrade for performance rebuilds or engine refreshes.

Proper ring end gap and clearance checks are recommended during assembly to ensure optimal performance and longevity. These pistons are designed to work seamlessly with existing Hellcat components, providing a reliable foundation for high-horsepower builds.

What's Included:

• Set of forged pistons (quantity as per engine requirements)
• Wrist pins compatible with full-floating or press-fit installation
• Precision-machined piston rings (if included per SKU)
• Installation guidelines and specifications

Ideal For:

This piston set is ideal for enthusiasts and professional builders seeking to upgrade or rebuild their Hellcat or Trackhawk 6.2L engines with high-quality forged components. Whether you are building a street performance machine, a drag racer, or a track-focused vehicle, these pistons provide the strength and reliability needed to handle increased boost, higher RPMs, and aggressive tuning.

They are also suitable for those looking to replace worn or damaged factory pistons with a durable, performance-oriented alternative that maintains OEM fitment and compatibility.

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.