DSS Racing FX Series Forged Piston Set

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

1-6706-3957 / 2-6706-3957 / 3-6706-3957 / K1-6706-3957 / K2-6706-3957 / K3-6706-3957

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 for their 5.7L Hemi engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi models, these pistons provide a reliable upgrade for stroker builds and high-output applications. With a forged construction and precision engineering, this piston set enhances engine strength and efficiency while maintaining optimal compression ratios for improved power delivery.

Ideal for those upgrading their Gen III Hemi engines, the DSS Racing FX Series pistons offer a balance of lightweight design and robust durability, making them suitable for street performance, racing, and custom engine builds.

Key Features:

These forged pistons incorporate advanced design elements to ensure superior performance and longevity:

• Compatible with 398 Small Block Mopar Hemi Gen III engines and FX series configurations
• Comp height of 1.09 inches for precise deck clearance
• 23cc dish top design to optimize combustion chamber volume and compression
• .927-inch wrist pin diameter with options for full-floating or press-fit pins
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
• Stroke length of 4.050 inches paired with 6.125-inch connecting rods
• Available in multiple compression ratios approximately ranging from 8.03 to 9.49, accommodating various combustion chamber sizes (65cc, 74cc, 85cc)
• Forged construction for enhanced strength and resistance to high-stress conditions

Construction & Design:

DSS Racing FX Series pistons are crafted from high-quality forged aluminum alloy, providing an excellent strength-to-weight ratio essential for high-performance engines. The forging process refines the metal grain structure, resulting in pistons that withstand elevated combustion pressures and temperatures typical in stroker and boosted applications.

The pistons feature a carefully engineered dish top design with a -23cc volume to optimize compression ratios and combustion efficiency. The precise ring grooves and wrist pin configurations ensure tight sealing and smooth articulation within the cylinder, 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, particularly those utilizing the Gen III Hemi platform. Installation requires standard engine assembly procedures, with attention to matching piston compression height and dish volume to the specific cylinder head combustion chamber size to achieve the desired compression ratio.

Depending on the wrist pin option selected (full-floating or press-fit), appropriate installation tools and techniques should be used to ensure proper fit and longevity. Professional installation is recommended to guarantee optimal engine performance and reliability.

What's Included:

• Set of forged pistons compatible with 5.7L Hemi Gen III FX series stroker builds
• Wrist pins (.927" diameter), available in full-floating or press-fit configurations
• Piston rings with 1.2mm top and second rings and 3mm oil rings
• Installation instructions and technical specifications

Ideal For:

• Engine builders upgrading or rebuilding 5.7L Hemi Gen III stroker engines
• Performance enthusiasts seeking durable forged pistons for street or track use
• Custom Mopar engine projects requiring precise compression ratio control
• Applications demanding enhanced strength and reliability under high RPM and boost 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.