DSS Racing FX Series Forged Flat Top Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 6.2L-6.4L Gen III Hemi Models

1-6810-4100 / 2-6810-4100 / 3-6810-4100 / K1-6810-4100 / K2-6810-4100 / K3-6810-4100

Overview:

The DSS Racing FX Series Forged Flat Top Piston Set is engineered for high-performance applications in Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.2L Hellcat, 6.4L 392, and Trackhawk Gen III Hemi engines. Designed to fit a 4.100" bore, these pistons offer a perfect balance of strength, durability, and precision for enthusiasts and professional builders seeking to maximize engine output and reliability.

These pistons are ideal for those upgrading or rebuilding their small block Mopar Hemi engines, providing enhanced combustion efficiency and improved compression ratios. Whether you’re building a street performance engine or a race-ready powerplant, the DSS Racing FX Series pistons deliver consistent performance under demanding conditions.

Key Features:

Built with advanced engineering and attention to detail, the FX Series pistons incorporate several features that optimize engine performance and longevity:

• Forged construction for superior strength and resistance to high stress
• Flat top design with a -1.5cc dish for optimized combustion chamber shape
• Comp height of 1.12" for precise deck clearance and piston-to-head fitment
• .927" wrist pin diameter with options for full-floating or press-fit installation
• Ring groove dimensions of 1.2mm top and second rings, and 3mm oil ring for effective sealing and oil control
• Compatible with 4.050" stroke crankshafts and 6.125" connecting rods
• Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from 10.16:1 to 12.58:1
• Designed specifically for the Gen III Hemi architecture ensuring perfect fit and function

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-quality forged aluminum alloy, providing an excellent strength-to-weight ratio essential for high RPM and high load conditions. The forging process enhances the grain structure of the metal, resulting in pistons that resist cracking, scuffing, and thermal fatigue.

The flat top design with a slight dish (-1.5cc) optimizes combustion efficiency by promoting better flame propagation and reducing detonation risk. Precision machining ensures tight tolerances for piston-to-cylinder wall clearance and ring groove dimensions, contributing to improved sealing and reduced blow-by.

Installation & Fitment:

These pistons are designed to fit most Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.2L Hellcat, 6.4L 392, and Trackhawk Gen III Hemi engines. Installation requires standard engine rebuild procedures, including proper ring installation and wrist pin fitting, whether using full-floating or press-fit pins.

Builders should verify bore size compatibility (4.100") and ensure that connecting rods and crankshaft stroke match the piston specifications for optimal performance and reliability. No major modifications are typically necessary when replacing stock pistons with this set.

What's Included:

• Set of forged flat top pistons (quantity as per engine requirements)
• Wrist pins sized at .927" diameter
• Ring grooves pre-machined for 1.2mm top and second rings, 3mm oil ring
• Installation instructions and technical specifications

Ideal For:

This piston set is perfect for performance enthusiasts, engine builders, and racers upgrading or rebuilding Gen III Hemi engines in Chrysler, Dodge, Jeep, and Ram vehicles. It suits applications ranging from street performance to track and drag racing, offering enhanced durability and compression options to meet various power 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.