DSS Racing Gen III Hemi FX Series Forged Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models

1-6720-3927 / 2-6720-3927 / 3-6720-3927 / K1-6720-3927 / K2-6720-3927 / K3-6720-3927

Overview:

The DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the 5.7L Small Block Mopar Hemi Gen III engines found in many Chrysler, Dodge, Jeep, and Ram vehicles. Designed for enthusiasts and professional builders seeking enhanced durability and performance, these pistons offer a reliable upgrade over stock components. Whether you are rebuilding your engine or upgrading for higher power output, this piston set provides the strength and precision needed for demanding applications.

With a compact design and optimized specifications, these pistons help maintain efficient combustion and compression ratios while supporting increased power and reliability. They are ideal for street performance, mild racing, and high-performance rebuilds.

Key Features:

The DSS Racing Gen III Hemi FX Series Forged Pistons incorporate advanced engineering and quality materials to deliver superior performance and longevity. Key features include:

• Forged construction for enhanced strength and durability under high stress
• Compacted height of 1.21 inches for precise fitment in Gen III 5.7L Hemi engines
• 1.5cc flat top design to optimize combustion chamber volume and compression
• .945-inch wrist pin diameter available in full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm top and second rings, 3mm oil ring for effective sealing
• Compatible with 3.578-inch stroke and 6.243-inch connecting rods
• Available in multiple compression ratios approximately 10.49:1 (65cc), 9.47:1 (74cc), and 8.49:1 (85cc) to suit various engine builds
• Precision machining for consistent performance and reduced friction

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 grain structure, resulting in superior resistance to cracking and deformation under extreme conditions. The flat top design with a slight volume reduction (-1.5cc) optimizes the combustion chamber shape for efficient burn and power delivery.

The pistons feature carefully engineered ring grooves that accommodate high-performance piston rings, ensuring optimal sealing and oil control. The wrist pin options allow for customization based on engine builder preference, whether full-floating for ease of maintenance or press-fit for maximum stability.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Gen III Hemi engine. Installation requires standard engine rebuild procedures and precise measurements to ensure proper piston-to-cylinder wall clearance and ring end gaps. No major modifications are typically necessary when replacing stock pistons with this set, making it a straightforward upgrade for experienced mechanics and engine builders.

What's Included:

• Set of forged pistons compatible with 5.7L Gen III Hemi engines
• Wrist pins (.945" diameter) in full-floating or press-fit options
• Detailed specifications for compression ratios and piston dimensions

Ideal For:

This piston set is ideal for automotive enthusiasts, professional engine builders, and performance tuners looking to upgrade or rebuild their 5.7L Gen III Hemi engines. It suits applications ranging from street performance and daily driving to mild racing and high-output builds where enhanced durability and reliable compression are essential.

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.