DSS Racing FX Series Forged Piston Set

Chrysler / Dodge / Jeep / Ram 6.1L SRT8

1-6801-4085 / 2-6801-4085 / 3-6801-4085 / K1-6801-4085 / K2-6801-4085 / K3-6801-4085

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for the 6.1L Gen III Mopar Hemi engines found in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models. Designed to deliver superior strength and durability, these pistons are ideal for enthusiasts and professional builders seeking reliable performance upgrades. Whether you are rebuilding your engine or enhancing it for higher power output, this piston set offers a perfect balance of lightweight construction and robust design to withstand demanding conditions.

With a compact dish top and optimized compression ratios, these pistons help improve combustion efficiency and power delivery while maintaining engine reliability. The FX Series pistons are a trusted choice for those who demand precision and quality in their high-performance Mopar builds.

Key Features:

Built to meet the rigorous demands of high-performance Mopar engines, the DSS Racing FX Series Forged Pistons include the following key features:

• Compatible with 6.1L Gen III Mopar Hemi engines used in Chrysler, Dodge, Jeep, and Ram SRT8 models
• Forged construction for enhanced strength and durability under high stress
• Compact dish top design with a -7cc dish volume for optimized combustion
• Compression heights of 1.09 inches to suit factory and modified engine builds
• Piston pin diameter of .927 inches, available in full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm for reliable sealing and reduced friction
• Stroke compatibility of 4.050 inches and connecting rod length of 6.125 inches
• Available in multiple dish volumes to achieve approximate compression ratios of 11.8:1, 10.71:1, and 9.65:1 depending on combustion chamber size

Construction & Design:

The DSS Racing FX Series pistons are precision forged from high-grade aluminum alloy, ensuring a lightweight yet incredibly strong component capable of handling the high cylinder pressures typical of performance Mopar engines. The forging process enhances the grain structure of the metal, providing superior fatigue resistance and thermal conductivity compared to cast pistons.

Each piston features a carefully engineered dish top design with a -7cc volume to optimize combustion chamber shape and improve flame propagation. The ring grooves are machined to exacting tolerances to accommodate high-performance piston rings, minimizing blow-by and oil consumption. The pistons are available with either full-floating or press-fit wrist pins, allowing builders to tailor the setup to their specific application and durability requirements.

Installation & Fitment:

This piston set is designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 Gen III Hemi engines. Installation requires standard engine rebuild procedures, including proper honing of cylinder walls and careful measurement of piston-to-wall clearance. The pistons’ compatibility with a 4.050-inch stroke and 6.125-inch connecting rods ensures seamless integration with factory or aftermarket rotating assemblies.

Professional installation is recommended to ensure optimal performance and longevity. No major modifications are typically required when upgrading to these DSS Racing forged pistons, making them an excellent choice for both street and track applications.

What's Included:

• Set of 8 DSS Racing FX Series forged pistons
• Wrist pins (full-floating or press-fit options depending on SKU)
• Piston rings compatible with 1.2/1.2/3mm groove dimensions
• Installation instructions and technical specifications

Ideal For:

This piston set is ideal for Mopar enthusiasts, engine builders, and racers who require a durable, high-performance piston solution for their 6.1L Gen III Hemi engines. Whether you are performing a complete engine rebuild, upgrading for forced induction, or enhancing naturally aspirated power, the DSS Racing FX Series pistons provide the strength and precision needed to maximize engine potential while maintaining reliability under demanding 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.