DSS Racing FX Series Forged Piston Set

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

1-6713-3937 / 2-6713-3937 / 3-6713-3937 / K1-6713-3937 / K2-6713-3937 / K3-6713-3937

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 meet the demands of high-performance applications, these pistons offer enhanced strength, durability, and reliability over stock components. Whether you are building a street performance engine or a race-ready powerplant, this piston set delivers the precision and quality needed to maximize your engine’s potential.

These pistons are ideal for enthusiasts and professional builders seeking to upgrade their 348 Small Block Mopar Hemi Gen III engines with components that provide improved combustion efficiency and withstand increased cylinder pressures. The FX Series pistons feature a forged construction and a carefully engineered dish top design to optimize compression ratios and combustion chamber dynamics.

Key Features:

The DSS Racing FX Series Forged Pistons combine advanced engineering with high-quality materials to ensure superior performance and longevity. Key features include:

• Compatible with most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines
• 3.937" bore size tailored for 348 Small Block Mopar Hemi Gen III applications
• Comp height of 1.21" for precise piston-to-deck clearance
• 12cc dish top design to optimize combustion chamber volume and compression ratio
• .927" piston pin diameter, available in full-floating or press-fit configurations
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing and oil control
• Stroke compatibility of 3.578" and connecting rod length of 6.243" for balanced engine geometry
• Available compression ratios approximately 9.38:1 (65cc), 8.59:1 (74cc), and 7.79:1 (85cc) to suit various build requirements
• Precision forged construction for enhanced strength and fatigue resistance

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent strength-to-weight ratio essential for high-performance engines. The forging process refines the grain structure of the metal, resulting in pistons that resist cracking, scuffing, and thermal fatigue under extreme operating conditions.

The pistons feature a carefully engineered dish top with a -12cc volume to optimize combustion chamber shape and promote efficient flame propagation. The ring grooves are machined to tight tolerances to ensure proper ring seating and minimize blow-by. Additionally, the pistons accommodate either full-floating or press-fit wrist pins, allowing flexibility depending on engine build preferences.

Installation & Fitment:

These pistons are designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, making them a direct replacement for stock pistons in compatible builds. Installation requires standard engine assembly procedures, including proper ring end gap setting and piston orientation. Depending on the wrist pin option selected, either full-floating or press-fit installation techniques should be followed.

Builders should verify bore size and clearances to ensure optimal fitment. No major modifications to the block are typically necessary, but professional installation is recommended to achieve the best performance and reliability.

What's Included:

• Set of forged pistons with 3.937" bore diameter
• Wrist pins (.927") compatible with full-floating or press-fit configurations
• Precision-machined piston rings sized 1.2mm/1.2mm/3mm
• Installation guidelines and specifications

Ideal For:

This piston set is ideal for engine builders and performance enthusiasts upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 5.7L Hemi engines. It suits applications ranging from street performance and mild racing to more aggressive builds requiring durable forged components. The variety of compression ratio options allows customization to match fuel types and tuning goals.

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.