DSS Racing FX Series Forged Pistons

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

1-6852-4090 / 2-6852-4090 / 3-6852-4090 / K1-6852-4090 / K2-6852-4090 / K3-6852-4090

Overview:

The DSS Racing FX Series Forged Pistons are precision-engineered performance components designed specifically for the 6.2L Gen III Mopar Hemi engines found in Chrysler, Dodge, Jeep, and Ram Hellcat and Trackhawk models. These pistons offer a perfect balance of strength, durability, and lightweight construction, making them ideal for enthusiasts and racers seeking to maximize engine reliability and power output under demanding conditions.

Crafted to exacting specifications, the FX Series pistons feature a 4.090" bore size and a compact 1.275" compression height, ensuring compatibility with the 376 Small Block Mopar Hemi Gen III platform. Their forged construction and optimized dish volume provide enhanced combustion efficiency and improved compression ratios, supporting both street performance and track applications.

Key Features:

Engineered for high-performance Mopar applications, these pistons incorporate advanced design elements to deliver superior results:

• Forged from premium billet aluminum for exceptional strength and heat resistance
• 4.090" bore diameter tailored for 6.2L Gen III Mopar Hemi engines
• Comp height of 1.275" for precise piston-to-head clearance and optimal combustion chamber volume
• 10cc dish top design to control compression and prevent detonation
• .945" 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
• Compatible with 3.578" stroke and 6.2" connecting rods for balanced engine dynamics
• Available in multiple dish volumes (65cc, 74cc, 85cc) to fine-tune compression ratios from 10.22:1 to 8.44:1
• Designed to withstand the rigors of high-boost, forced induction, and naturally aspirated setups

Construction & Design:

The DSS Racing FX Series pistons are forged from high-grade aluminum alloy, providing an optimal combination of lightweight properties and structural integrity. This forging process enhances grain structure and mechanical strength, allowing the pistons to endure extreme combustion pressures and temperatures common in Hellcat and Trackhawk engines.

Each piston features a carefully engineered dish top to manage compression ratios and combustion characteristics, reducing the risk of knock while maintaining power output. The pin bore is precision-machined to accept either full-floating or press-fit wrist pins, offering flexibility depending on engine build preferences. Additionally, the ring grooves are designed to securely hold high-performance rings, ensuring excellent sealing and reduced blow-by.

Installation & Fitment:

These pistons are direct-fit replacements for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines equipped with the Gen III Mopar Hemi platform. Installation requires standard engine disassembly and piston removal procedures. Due to the precision manufacturing and exact bore sizing, minimal modifications are necessary, but professional installation and proper engine blueprinting are recommended to achieve optimal performance and reliability.

What's Included:

• Set of forged DSS Racing FX Series pistons (quantity as required for engine)
• Choice of wrist pin configuration: full-floating or press-fit
• Technical specifications and installation guidelines

Ideal For:

The DSS Racing FX Series Forged Pistons are ideal for performance enthusiasts, professional racers, and engine builders upgrading or rebuilding 6.2L Hellcat and Trackhawk engines. They are particularly suited for applications demanding increased durability under high horsepower, forced induction, and track conditions, while maintaining street drivability and reliability.

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.