DSS Racing FX Series Forged Piston Set

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

1-6867-4090 / 2-6867-4090 / 3-6867-4090 / K1-6867-4090 / K2-6867-4090 / K3-6867-4090

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for high-performance applications in most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk models. Designed to handle the extreme demands of the 376 Small Block Mopar Hemi Gen III engine, these pistons offer superior strength and durability for enthusiasts looking to maximize power and reliability. Whether you're building a street machine or a track-ready beast, this piston set provides the foundation for enhanced engine performance and longevity.

With a bore size of 4.090 inches and a compression height of 1.275 inches, these pistons are optimized for compatibility and performance. The +4cc dome top design allows for precise combustion chamber volume adjustments, enabling tuners to achieve ideal compression ratios for various setups.

Key Features:

Built to meet the rigorous demands of high-output Hellcat engines, the DSS Racing FX Series Forged Pistons include the following key features:

• Forged construction for exceptional strength and durability under high stress
• 4.090" bore size, compatible with most Chrysler / Dodge / Jeep / Ram 6.2L Hellcat and Trackhawk engines
• +4cc dome top design to optimize combustion chamber volume and compression ratio
• Pin diameter of .927" with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing and reduced friction
• Stroke compatibility of 3.578" and connecting rod length of 6.2 inches for precise engine geometry
• Available compression ratios approximately 12.06:1 (65cc), 10.79:1 (74cc), and 9.59:1 (85cc) to suit different performance goals
• Designed for use with the 376 Small Block Mopar Hemi Gen III platform

Construction & Design:

The DSS Racing FX Series pistons are forged from premium-grade aluminum alloy, providing an optimal balance of lightweight design and high tensile strength. This construction ensures the pistons can withstand the intense pressures and temperatures generated by boosted or naturally aspirated Hellcat engines. The dome top design enhances combustion efficiency and allows for fine-tuning compression ratios to match specific engine builds.

Each piston features precision-machined pin bores and ring grooves to maintain tight tolerances and reduce wear. The option for full-floating or press-fit wrist pins offers flexibility depending on the engine builder’s preference and application requirements. The ring groove dimensions are engineered to provide excellent ring sealing while minimizing friction and wear, contributing to improved engine efficiency and longevity.

Installation & Fitment:

These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines, making installation straightforward for experienced engine builders. Proper machining and clearances should be verified during installation to ensure optimal performance and reliability. Depending on the chosen wrist pin configuration, minor adjustments to the connecting rods may be necessary. This piston set is ideal for high-performance rebuilds and custom engine builds aiming to increase power output and durability.

What's Included:

• Set of forged pistons with 4.090" bore size
• Wrist pin options: full-floating or press-fit
• Precision-machined ring grooves for 1.2/1.2/3mm ring sets

Ideal For:

• Performance enthusiasts upgrading or rebuilding 6.2L Hellcat and Trackhawk engines
• Engine builders seeking durable forged pistons for high-boost or high-RPM applications
• Street and track vehicles requiring enhanced piston strength and optimized compression ratios
• Custom Mopar Hemi Gen III builds aiming for reliable power gains and longevity

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.