DSS Racing FX Series Forged Piston Set

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

1-6723-3927 / 2-6723-3927 / 3-6723-3927 / K1-6723-3927 / K2-6723-3927 / K3-6723-3927

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the 347 Small Block Mopar Hemi Gen III. Designed for high-performance applications, these pistons offer exceptional strength and durability to withstand the rigors of boosted, high-boost, and naturally aspirated builds. Whether you are upgrading your engine for racing, street performance, or heavy-duty use, this piston set delivers reliable power and efficiency improvements.

With a 3.927" bore size and a compact 1.21" compression height, these pistons are optimized for enhanced combustion and reduced weight. The -12cc dish top design helps control compression ratios, making them suitable for a variety of tuning setups. DSS Racing’s FX Series pistons are a trusted choice for enthusiasts seeking a balance of performance, reliability, and precision engineering.

Key Features:

Built to meet the demands of high-performance Mopar Hemi engines, the FX Series Forged Pistons include:

• Forged construction for superior strength and durability under extreme conditions
• 3.927" bore size compatible with most 5.7L Hemi applications
• Compact 1.21" compression height for optimized piston-to-cylinder fit
• 12cc dish top design to manage compression ratios effectively
• .945" wrist pin diameter with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing and reduced friction
• Stroke compatibility of 3.578" and connecting rod length of 6.243" for precise engine geometry
• Available in multiple dish volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 7.78 to 9.37
• Designed for 347 Small Block Mopar Hemi Gen III engines, ensuring exact fitment and performance

Construction & Design:

The DSS Racing FX Series pistons are forged from premium-grade aluminum alloy, delivering an optimal balance of lightweight design and high tensile strength. This forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under high cylinder pressures and elevated temperatures.

Each piston features precision-machined ring grooves and a carefully engineered dish top to optimize combustion chamber dynamics. The wrist pin bore is designed to accommodate either full-floating or press-fit pins, allowing flexibility depending on engine build preferences. The pistons’ compact compression height and carefully calculated dish volume options provide tuners with the ability to fine-tune compression ratios for a wide range of performance goals.

Installation & Fitment:

These pistons are designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the 347 Small Block Mopar Hemi Gen III. Installation requires standard engine rebuilding procedures and may involve balancing and honing to ensure optimal piston-to-cylinder wall clearance. The choice between full-floating or press-fit wrist pins allows compatibility with various connecting rod configurations.

Professional installation is recommended to ensure precise fitment and to maximize the pistons’ performance and longevity. These pistons are ideal for engine builders upgrading or rebuilding 5.7L Hemi engines for street, strip, or off-road applications.

What's Included:

• Set of forged FX Series pistons (quantity as per SKU selection)
• Wrist pins (.945" diameter) compatible with full-floating or press-fit installation
• Detailed specifications for bore size, compression height, and dish volume

Ideal For:

The DSS Racing FX Series Forged Piston Set is ideal for automotive enthusiasts, professional engine builders, and racers who demand enhanced durability and performance from their 5.7L Hemi engines. Whether upgrading for forced induction, naturally aspirated power gains, or heavy-duty applications, these pistons provide the strength and precision needed to support higher horsepower and torque outputs reliably.

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.