DSS Racing FX Series Forged Piston Set

Fits Chrysler, Dodge, Jeep, Ram 6.2L Hellcat & Trackhawk

1-6857-4100 / 2-6857-4100 / 3-6857-4100 / K1-6857-4100 / K2-6857-4100 / K3-6857-4100

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for high-performance applications in Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.2L Hellcat and Trackhawk engines. Designed to replace factory pistons, this set offers enhanced strength and durability to withstand the extreme pressures and temperatures generated by boosted and high-output powertrains.

Ideal for enthusiasts and professional builders seeking reliable, race-ready components, these forged pistons improve engine longevity and performance consistency. Their precise dimensions and advanced design ensure optimal combustion efficiency and compatibility with stock and aftermarket components.

Key Features:

These pistons incorporate advanced engineering to meet the demands of modern high-performance Mopar engines:

• Compatible with 378 Small Block Mopar Hemi Gen III engines
• 4.100" bore size tailored for most 6.2L Hellcat and Trackhawk models
• Compact FX series design with a 1.275" compression height for improved piston-to-cylinder fit
• +4cc dome top for enhanced combustion chamber volume and optimized compression ratios
• .945" wrist pin diameter with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
• Stroke compatibility at 3.578" with a 6.2" connecting rod length for balanced engine dynamics
• Available in multiple dome volumes to achieve approximate compression ratios of 12.12:1 (65cc), 10.84:1 (74cc), and 9.64:1 (85cc)
• Precision CNC machining ensures tight tolerances and consistent performance

Construction & Design:

Manufactured from high-grade forged aluminum alloy, the DSS Racing FX Series pistons deliver exceptional strength-to-weight ratio essential for high-revving, forced induction engines. The forging process enhances grain structure and durability, reducing the risk of cracking or deformation under extreme conditions.

The pistons feature a dome top design with carefully calculated volume to optimize combustion efficiency and power output. The wrist pin bore supports both full-floating and press-fit pins, providing flexibility for various engine builds and preferences. Additionally, the ring grooves are precision cut to maintain ring seal integrity and reduce friction.

Installation & Fitment:

This piston set is designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines. Installation requires standard engine rebuild procedures, including proper honing and cleaning of the cylinder bores. Depending on the wrist pin configuration chosen, minor adjustments may be necessary to accommodate full-floating or press-fit pins.

Professional installation is recommended to ensure correct piston orientation, ring end gap settings, and torque specifications are met for optimal engine performance and reliability.

What's Included:

• Set of forged pistons with 4.100" bore size
• Wrist pins (full-floating or press-fit options depending on SKU)
• Detailed specifications for compression height, dome volume, and ring groove dimensions

Ideal For:

This piston set is perfect for performance enthusiasts, engine builders, and racers upgrading or rebuilding 6.2L Hellcat and Trackhawk engines who require durable, high-quality components capable of handling increased boost levels and aggressive tuning. It is especially suited for applications demanding improved strength and thermal resistance over stock pistons.

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.