DSS Racing FX Series Forged Piston Set

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

1-6713-3957 / 2-6713-3957 / 3-6713-3957 / K1-6713-3957 / K2-6713-3957 / K3-6713-3957

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Hemi engine. Designed to replace factory pistons, this set offers enhanced strength and durability for high-performance and demanding applications. Whether you are building a street performance engine or a race-ready powerplant, these pistons provide the reliability and precision needed to handle increased power and boost levels.

Crafted for the 352 Small Block Mopar Hemi Gen III platform, the FX Series pistons feature a compact design with a 3.957" bore size and a 1.21" compression height. Their -12cc dish top design helps optimize combustion chamber volume and compression ratio, making them ideal for a variety of build goals.

Key Features:

These forged pistons incorporate advanced engineering and materials to deliver superior performance and longevity. Key features include:

• Forged construction for maximum strength and resistance to detonation
• 3.957" bore size compatible with most 5.7L Hemi engines
• 12cc dish top design to optimize compression and combustion efficiency
• 1.21" compression height tailored for Gen III Small Block Mopar Hemi
• 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
• Compatible with a 3.578" stroke and 6.243" connecting rods
• Available in multiple dish volumes to achieve approximate compression ratios ranging from 7.86 to 9.48

Construction & Design:

The DSS Racing FX Series pistons are forged from high-grade aluminum alloy, providing an excellent balance of strength, weight, and thermal conductivity. The forging process enhances grain structure and durability, allowing these pistons to withstand the high pressures and temperatures typical of boosted or high-output Hemi engines.

The pistons feature a carefully engineered dish top design with a -12cc volume to optimize combustion chamber shape and reduce the risk of detonation. Precision machining ensures tight tolerances for piston pin fitment and ring groove dimensions, contributing to improved sealing and reduced blow-by.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, specifically the Gen III Small Block Mopar Hemi platform. Installation requires standard engine rebuild procedures, including proper ring end gap setting and piston pin installation. The pistons accommodate either full-floating or press-fit wrist pins, depending on your build preference.

Due to the precise compression height and bore size, these pistons integrate seamlessly with stock or aftermarket connecting rods and crankshafts with a 3.578" stroke and 6.243" rod length. No major modifications are typically necessary, making them a direct upgrade for performance rebuilds.

What's Included:

• Set of forged pistons (quantity as required for engine)
• Wrist pins (full-floating or press-fit options depending on SKU)
• Ring grooves machined for 1.2/1.2/3mm piston rings (rings not included)

Ideal For:

This piston set is ideal for enthusiasts and professional builders seeking a durable, high-performance piston upgrade for the 5.7L Hemi engine. It suits naturally aspirated builds as well as forced induction applications, including turbocharged and supercharged setups. Whether upgrading for increased horsepower, improved reliability, or engine longevity, the DSS Racing FX Series pistons deliver a solid foundation for your build.

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.