DSS Racing FX Series Forged Piston Set

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

1-6723-3957 / 2-6723-3957 / 3-6723-3957 / K1-6723-3957 / K2-6723-3957 / K3-6723-3957

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the 352 Small Block Mopar Hemi Gen III platform. Designed for enthusiasts and professional builders seeking enhanced durability and performance, these pistons offer a reliable upgrade over stock components. Their forged construction ensures superior strength and resistance to high-stress conditions, making them ideal for high-performance street, track, or mild racing applications.

With a bore size of 3.957 inches and a compression height of 1.21 inches, these pistons are precision-crafted to maintain optimal engine geometry and performance. The -12cc dish top design helps control compression ratios, allowing for tuning flexibility depending on your build requirements.

Key Features:

These forged pistons incorporate advanced design elements tailored for the 5.7L Hemi engine platform:

• Compatible with 3.957" bore size for most Chrysler / Dodge / Jeep / Ram 5.7L Hemi engines
• Forged construction for enhanced strength and durability under high load
• 12cc dish top design to optimize combustion chamber volume and compression ratio
• Compression height of 1.21" to maintain proper piston-to-deck clearance
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
• Pin diameter of .945" compatible with full-floating or press-fit configurations
• Designed for use with 6.243" connecting rods and 3.578" stroke crankshafts
• Approximate compression ratios available: 9.48:1 (65cc), 8.67:1 (74cc), and 7.86:1 (85cc) depending on combustion chamber volume

Construction & Design:

The FX Series pistons are forged from high-grade aluminum alloy, providing an excellent balance of lightweight properties and mechanical strength. This material choice improves thermal conductivity and reduces reciprocating mass, contributing to quicker engine response and durability. The pistons feature a carefully engineered dish top to manage compression and combustion characteristics, enhancing efficiency and power potential.

Each piston is precision-machined to tight tolerances, ensuring consistent ring groove dimensions and pin fitment. The option for full-floating or press-fit wrist pins allows compatibility with various rod designs and assembly preferences. The robust ring groove design supports reliable sealing under demanding operating conditions, reducing blow-by and oil consumption.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the Gen III 352 Small Block Mopar Hemi. Installation requires standard engine rebuilding procedures, including proper honing of cylinder bores to the specified 3.957" diameter. Depending on your engine build, minor modifications may be necessary to accommodate the piston dish volume and compression height.

These pistons are compatible with 6.243" connecting rods and a 3.578" stroke crankshaft, making them a direct fit for many common 5.7L Hemi configurations. Professional installation is recommended to ensure optimal clearances and performance.

What's Included:

• Set of forged pistons (quantity as per kit selection)
• Wrist pins compatible with full-floating or press-fit installation
• Detailed specifications and installation guidelines

Ideal For:

The DSS Racing FX Series Forged Piston Set is ideal for performance enthusiasts, engine builders, and racers upgrading their 5.7L Hemi engines. Whether you are building a high-performance street machine, a mild race engine, or a durable daily driver with enhanced power, these pistons provide the strength and reliability needed to handle increased cylinder pressures and RPMs. They are especially suited for those seeking improved engine longevity and consistent performance under demanding conditions.

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.