DSS Racing FX Series Forged Piston Set

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

1-6847-4100 / 2-6847-4100 / 3-6847-4100 / K1-6847-4100 / K2-6847-4100 / K3-6847-4100

Overview:

The DSS Racing 6.1 Stroker Gen III Hemi FX Series Forged Piston Set is engineered specifically for high-performance applications in Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.1L SRT8 engine. Designed to accommodate a 4.100" bore, these pistons are ideal for enthusiasts and builders looking to enhance engine durability and power output while maintaining reliable street and track performance.

Featuring a +4cc dome top design and a comp height of 1.21", these pistons support increased compression ratios and improved combustion efficiency. Whether you are building a stroker motor or upgrading your factory components, this piston set delivers the strength and precision required for demanding Gen III Hemi builds.

Key Features:

Built with performance and reliability in mind, the DSS Racing FX Series pistons offer the following key features:

• Compatible with 4.100" bore sizes for most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
• Forged construction for superior strength and resistance to detonation
• +4cc dome top design to optimize compression and combustion
• Comp height of 1.21" for precise piston-to-deck clearance
• Pin diameter of .927" with options for full-floating or press-fit pins
• Ring groove dimensions of 1.2/1.2/3mm for reliable ring sealing and reduced friction
• Designed for a 3.578" stroke and 6.243" connecting rod length, ideal for stroker builds
• Available in multiple dome volumes (65cc, 74cc, 85cc) to tailor compression ratios from 9.64 to 12.12

Construction & Design:

Each piston in the DSS Racing FX Series is crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight strength and thermal conductivity. The forging process enhances grain structure, resulting in pistons that withstand the extreme pressures and temperatures of high-performance Gen III Hemi engines.

The dome top design increases combustion chamber volume, allowing for higher compression ratios without sacrificing detonation resistance. Precision machining ensures tight tolerances for optimal ring fitment and piston-to-cylinder wall clearance, contributing to improved engine efficiency and longevity.

Installation & Fitment:

These pistons are designed to fit most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models with a 4.100" bore. Installation requires standard engine assembly procedures, with attention to proper ring end gap and pin installation based on the selected pin type (full-floating or press-fit). Builders should verify piston-to-valve clearance and deck height compatibility when assembling stroker configurations.

What's Included:

• Set of forged pistons (quantity as required for engine configuration)
• Piston pins (full-floating or press-fit options)
• Piston rings with 1.2/1.2/3mm groove dimensions
• Installation instructions and technical specifications

Ideal For:

This piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding 6.1L SRT8 Gen III Hemi engines. It suits applications ranging from street performance to competitive motorsports where increased displacement and compression are desired without compromising durability.

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.