DSS Racing FX Series Forged Piston Set

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

1-6806-4085 / 2-6806-4085 / 3-6806-4085 / K1-6806-4085 / K2-6806-4085 / K3-6806-4085

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 6.1L SRT8 engines. Designed to accommodate a 4.085" bore, these pistons are ideal for enthusiasts looking to upgrade their 425 Small Block Mopar Hemi Gen III engines with enhanced durability and precision. Featuring a compact dish top design and optimized compression ratios, this piston set delivers reliable strength and improved combustion efficiency for street and track use.

Whether you are rebuilding your engine or upgrading for increased power output, these forged pistons provide a robust foundation to handle the demands of stroker builds and high RPM operation. The FX Series pistons are crafted to maintain tight tolerances and superior balance, ensuring consistent performance and longevity under extreme conditions.

Key Features:

Built with advanced engineering and materials, the DSS Racing FX Series pistons offer several key benefits:

• Compatible with 4.085" bore size, fitting most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
• Forged construction for enhanced strength and durability over cast pistons
• Compact dish top design with -23cc dish volume to optimize combustion chamber shape
• Pin diameter of .927" 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
• Designed for a 4.050" stroke and 6.125" connecting rod length, supporting stroker builds
• Available in multiple compression ratios: approximately 10.02:1 (65cc), 9.25:1 (74cc), and 8.47:1 (85cc)
• Precision machining ensures optimal fitment and performance consistency

Construction & Design:

These pistons are forged from high-grade aluminum alloy, providing superior strength-to-weight ratio essential for high-performance engines. The forging process enhances the metal grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue. The dish top design reduces compression volume, allowing for fine-tuning of compression ratios to match specific engine builds and fuel requirements.

The piston pin bore is engineered to accept either full-floating or press-fit pins, giving builders flexibility based on their application and preferences. Ring grooves are precisely cut to accommodate standard ring sizes, ensuring excellent sealing and durability under high cylinder pressures.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines with a 4.085" bore. Installation requires standard engine rebuilding procedures, including proper honing of cylinder walls and careful measurement of clearances. The pistons are compatible with the Gen III Hemi 425 Small Block Mopar platform and support stroker configurations with a 4.050" stroke and 6.125" connecting rods.

Professional installation is recommended to ensure correct ring end gaps, piston-to-wall clearances, and pin fitment. These pistons are suitable for both full-floating and press-fit pin setups, allowing customization based on engine build requirements.

What's Included:

• Set of forged pistons for 4.085" bore size
• Options for full-floating or press-fit wrist pins (depending on SKU)
• Precision-machined ring grooves ready for standard piston rings

Ideal For:

This piston set is ideal for automotive enthusiasts and professional engine builders upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 6.1L SRT8 engines. It suits stroker engine builds, high-performance street cars, and track vehicles requiring durable, lightweight pistons capable of handling increased cylinder pressures and RPM. The multiple compression ratio options allow for tuning to specific fuel types and performance 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.