DSS Racing FX Series Forged Flat Top Pistons

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

1-6850-4100 / 2-6850-4100 / 3-6850-4100 / K1-6850-4100 / K2-6850-4100 / K3-6850-4100

Overview:

The DSS Racing FX Series Forged Flat Top Pistons are engineered specifically for the 6.2L Gen III Hemi engines found in most Chrysler, Dodge, Jeep, and Ram Hellcat and Trackhawk models. Designed to replace factory pistons, these forged pistons offer enhanced strength and durability for high-performance applications. Whether you are building a street machine or a track-ready powerhouse, these pistons provide the reliability and precision needed to handle increased power and boost levels.

With a flat top design and a compact combustion chamber volume, these pistons help optimize compression ratios for improved combustion efficiency and power delivery. They are ideal for enthusiasts seeking to upgrade their engine internals for better performance and longevity under demanding conditions.

Key Features:

The DSS Racing FX Series pistons combine advanced engineering with premium materials to deliver superior performance and durability. Key features include:

• Forged construction for maximum strength and resistance to high stress
• Flat top design with a -1.5cc dish for optimized combustion chamber volume
• Comp height of 1.275" for precise piston-to-head clearance
• Pin diameter of .945" available in full-floating or press-fit options
• Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
• Compatible with 3.578" stroke and 6.2" connecting rods typical of the 6.2L Gen III Hemi
• Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from 9.09:1 to 11.23:1
• Precision CNC machining ensures tight tolerances and consistent performance

Construction & Design:

These pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight strength and thermal conductivity. The forging process enhances the grain structure of the metal, resulting in pistons that withstand extreme combustion pressures and temperatures without deformation.

The flat top design reduces quench distance and promotes efficient flame propagation, contributing to improved power output and fuel efficiency. The pistons are engineered to fit the 378 Small Block Mopar Hemi Gen III architecture, ensuring seamless integration with stock or upgraded components.

Installation & Fitment:

The DSS Racing FX Series pistons are designed as direct replacements for factory pistons in most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines. Installation requires standard engine rebuild procedures, including proper ring end gap setting and clearance checks. Depending on the pin type selected—full-floating or press-fit—appropriate wrist pin installation techniques should be followed.

These pistons accommodate the factory 3.578" stroke crankshaft and 6.2" connecting rods, making them suitable for both stock and modified bottom ends. No major modifications to the engine block or cylinder heads are typically necessary, but professional installation is recommended to ensure optimal performance and reliability.

What's Included:

• Set of 8 DSS Racing FX Series Forged Flat Top Pistons
• Wrist pins (full-floating or press-fit depending on SKU)
• Piston rings compatible with 1.2/1.2/3mm groove dimensions
• Installation instructions and technical specifications

Ideal For:

These pistons are perfect for performance enthusiasts, engine builders, and racers upgrading their 6.2L Gen III Hemi engines. They are especially suited for applications involving forced induction, high compression builds, and extended durability requirements. Whether upgrading a Hellcat, Trackhawk, or other compatible Mopar 6.2L platforms, these pistons provide a solid 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.