DSS Racing FX Series Forged Piston Set

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

1-6703-3927 / 2-6703-3927 / 3-6703-3927 / K1-6703-3927 / K2-6703-3927 / K3-6703-3927

Overview:

The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered to elevate the performance and durability of your 5.7L Hemi engine. Designed specifically for Chrysler, Dodge, Jeep, and Ram applications, this piston set is ideal for enthusiasts seeking enhanced strength and reliability in high-stress environments. Whether you're building a stroker engine or upgrading your factory components, these forged pistons deliver precision fitment and superior combustion efficiency.

With a focus on compatibility and performance, the pistons feature a -12cc dish top design and a compact 1.09" compression height, making them suitable for a variety of build configurations. Their robust construction supports increased stroke lengths and higher compression ratios, ensuring your engine can handle demanding power levels with confidence.

Key Features:

These DSS Racing forged pistons incorporate advanced design elements to maximize engine performance and longevity:

• Compatible with 392 Small Block Mopar Hemi Gen III engines and FX series builds
• Comp Height: 1.09" for optimal piston-to-head clearance
• 12cc dish top for precise combustion chamber volume control
• Pin diameter: .927" with options for full-floating or press-fit installation
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
• Designed for a 4.050" stroke and 6.125" connecting rods, supporting stroker applications
• Approximate compression ratios vary by combustion chamber volume: 65cc (10.46:1), 74cc (9.55:1), and 85cc (8.66:1)
• Forged construction for superior strength and resistance to detonation
• Precision machining ensures consistent fit and performance

Construction & Design:

DSS Racing pistons are crafted from high-quality forged aluminum alloy, providing an excellent balance of strength, weight, and thermal conductivity. The forging process enhances the grain structure of the metal, resulting in pistons that withstand the rigors of high-performance and forced induction applications. The -12cc dish top design helps manage compression ratios and combustion dynamics, reducing the risk of knock while optimizing power output.

Each piston features carefully engineered ring grooves to accommodate standard ring sets, ensuring effective sealing and oil control. The pin bore is designed to accept either full-floating or press-fit wrist pins, offering flexibility depending on your engine build preferences. The compact compression height and precise dimensions allow for seamless integration into stroker setups with 4.050" stroke crankshafts and 6.125" rods.

Installation & Fitment:

This piston set is engineered to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, particularly those utilizing the Gen III small block Mopar Hemi platform. Installation requires standard engine assembly procedures, with attention to proper ring end gap and wrist pin fitment based on your chosen configuration. The pistons are compatible with a variety of compression chamber volumes, allowing builders to tailor compression ratios to their specific performance goals.

While designed for direct fitment, professional installation is recommended to ensure optimal clearances and engine reliability. These pistons are ideal for stroker builds and high-performance engine upgrades where durability and precision are paramount.

What's Included:

• Set of forged pistons (quantity as per kit selection)
• Wrist pin options: full-floating or press-fit (depending on SKU)
• Detailed specifications for compression height, dish volume, and ring groove dimensions

Ideal For:

This piston set is perfect for engine builders, performance enthusiasts, and racers upgrading or rebuilding 5.7L Hemi engines. Whether constructing a stroker motor or enhancing factory components for increased power and durability, these pistons provide a reliable foundation for high-performance applications. They are especially suited for those seeking to optimize compression ratios and stroke length in Gen III Mopar Hemi platforms.

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.