DSS Racing FX Series Forged Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models

1-6847-4055 / 2-6847-4055 / 3-6847-4055 / K1-6847-4055 / K2-6847-4055 / K3-6847-4055

Overview:

The DSS Racing 6.1 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and professional builders seeking durable, high-performance pistons for their 6.1L SRT8 engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram models equipped with the 6.1L Hemi, this piston set supports stroker builds with a 3.578" stroke and offers enhanced strength and reliability under demanding conditions.

These forged pistons provide improved combustion efficiency and durability, making them ideal for high-output street, track, or racing applications. Whether upgrading a factory engine or building a custom stroker, this piston set delivers precision fitment and performance consistency.

Key Features:

Built with advanced engineering and quality materials, the DSS Racing FX Series pistons include the following key features:

• Compatible with 6.1L Small Block Mopar Hemi Gen III engines
• Comp height of 1.21" for optimal piston-to-head clearance
• +4cc dome top design to enhance compression and combustion
• .927" wrist pin diameter 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 3.578" stroke and 6.243" connecting rod length
• Available in multiple dome volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.47:1 to 11.91:1
• Precision forged for superior strength and fatigue resistance
• Optimized for high-performance stroker engine builds

Construction & Design:

DSS Racing pistons are forged from premium-grade aluminum alloy, providing an excellent balance of lightweight construction and high tensile strength. The forging process enhances grain structure, resulting in pistons that withstand extreme combustion pressures and temperatures common in performance engines.

The dome top design with varying volumes allows builders to fine-tune compression ratios to match specific engine configurations and fuel requirements. The pistons feature carefully machined ring grooves and wrist pin bores to ensure tight sealing and smooth articulation with the connecting rods, whether using full-floating or press-fit pins.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.1L SRT8 Small Block Mopar Hemi Gen III engine. Installation requires standard engine assembly procedures, with attention to proper ring end gap and wrist pin installation method based on the chosen pin type.

Builders upgrading to a stroker configuration with a 3.578" stroke will benefit from the piston's compatible dimensions and dome volumes, ensuring optimal piston-to-cylinder head clearance and compression ratio. Professional installation is recommended to achieve precise tolerances and reliable engine performance.

What's Included:

• Set of forged pistons (quantity as required for engine build)
• Wrist pins (full-floating or press-fit options depending on SKU)
• Ring grooves machined to specified dimensions
• Technical specifications and installation guidelines

Ideal For:

This DSS Racing forged piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding 6.1L SRT8 Mopar Hemi engines. It suits stroker builds, high-compression street engines, and track-focused applications where durability and precise combustion chamber control are critical.

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.