DSS Racing FX Series Forged Piston Set

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

1-6708-3937 / 2-6708-3937 / 3-6708-3937 / K1-6708-3937 / K2-6708-3937 / K3-6708-3937

Overview:

The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and builders seeking durable, high-performance pistons tailored for Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines. Designed to accommodate stroker builds with a 4.050" stroke and 6.125" rod length, these pistons provide optimal combustion chamber volume options and compression ratios to suit various performance goals.

Whether upgrading a factory engine or building a custom stroker, this piston set delivers reliable strength and precision fitment, making it an excellent choice for street, strip, or mild race applications.

Key Features:

These forged pistons incorporate advanced design elements to enhance engine durability and efficiency:

• Compatible with 394 Small Block Mopar Hemi Gen III FX engines
• Comp height of 1.09" for precise deck clearance
• +9cc dome top design for increased compression and combustion efficiency
• 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
• Stroke length of 4.050" matched with 6.125" connecting rods
• Available combustion chamber volumes: 65cc, 74cc, and 85cc, enabling compression ratios from 10.62:1 up to 13.63:1
• Forged construction for superior strength and resistance to high stress

Construction & Design:

Crafted from high-quality forged aluminum alloy, these pistons are built to withstand the rigors of high-performance and stroker engine builds. The forging process enhances grain structure and mechanical properties, resulting in pistons that resist cracking, scuffing, and thermal fatigue.

The dome top design with a +9cc volume optimizes combustion chamber shape for improved power output and efficiency. Precision machining ensures tight tolerances for excellent ring sealing and piston-to-wall clearance, reducing friction and wear over time.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines equipped with Gen III Small Block Mopar Hemi architecture. Installation requires standard engine assembly procedures and may necessitate matching connecting rods and crankshaft stroke to achieve the specified 4.050" stroke and 6.125" rod length.

Builders should verify piston-to-deck clearance and compression ratio based on their specific cylinder head and gasket combinations. The choice between full-floating or press-fit wrist pins allows customization based on engine application and builder preference.

What's Included:

• Set of forged pistons (quantity as required for engine configuration)
• Wrist pins (full-floating or press-fit options depending on SKU)
• Ring grooves machined to specified dimensions

Ideal For:

This piston set is ideal for engine builders and performance enthusiasts upgrading or rebuilding 5.7L Hemi engines who require durable, high-strength pistons capable of handling increased stroke and compression. It suits street performance, drag racing, and mild to moderate track applications where reliability and power gains 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.