DSS Racing FX Series Forged Piston Set

Chrysler / Dodge / Jeep / Ram 6.1L SRT8

1-6845-4055 / 2-6845-4055 / 3-6845-4055 / K1-6845-4055 / K2-6845-4055 / K3-6845-4055

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for the 6.1L Gen III Hemi engines found in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models. Designed to meet the demands of high-performance applications, these pistons offer exceptional strength and durability while maintaining optimal combustion efficiency. Whether you are rebuilding your engine or upgrading for enhanced power and reliability, this piston set provides a direct-fit solution that balances performance with longevity.

Built for enthusiasts and professional builders alike, the FX Series pistons are ideal for those seeking to maximize their engine’s potential without compromising on quality or fitment. Their precise dimensions and advanced design ensure compatibility with stock and modified components, making them a versatile choice for a wide range of performance builds.

Key Features:

The DSS Racing FX Series Forged Pistons incorporate advanced engineering and premium materials to deliver superior performance and reliability. Key features include:

• Forged construction for enhanced strength and durability under high stress
• Comp height of 1.21 inches for optimal piston-to-head clearance
• 18cc dish top design to control compression and support various combustion chamber volumes
• .927 inch pin diameter with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
• Compatible with a 3.578 inch stroke and 6.243 inch connecting rods
• Available in multiple dish volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 7.8:1 to 9.29:1
• Precision manufacturing to ensure consistent fitment and performance in 6.1L Gen III Hemi engines

Construction & Design:

These pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight construction and structural integrity. The forging process enhances grain structure, resulting in pistons that resist cracking and deformation under extreme heat and pressure. The dish top design helps manage compression ratios and combustion dynamics, making these pistons suitable for both street and track applications.

The piston pin bore is engineered to accept either full-floating or press-fit pins, allowing flexibility depending on your engine build preferences. Ring grooves are machined to tight tolerances, ensuring proper ring sealing and minimizing blow-by for improved engine efficiency.

Installation & Fitment:

The DSS Racing FX Series Forged Pistons are designed as direct replacements for the 6.1L Gen III Hemi engines used in Chrysler, Dodge, Jeep, and Ram SRT8 models. Installation requires standard engine rebuilding procedures and should be performed by a qualified technician to ensure proper clearances and torque specifications. No major modifications are typically necessary, making these pistons a straightforward upgrade for performance rebuilds or repairs.

What's Included:

• Set of forged pistons (quantity as required per engine)
• Piston pins compatible with full-floating or press-fit installation
• Precision-machined ring grooves ready for high-performance piston rings

Ideal For:

This piston set is ideal for performance enthusiasts, engine builders, and racers who demand reliable, high-strength components for their 6.1L Gen III Hemi engines. Whether upgrading for increased power, rebuilding a worn engine, or preparing a vehicle for track use, these pistons provide a durable and precise foundation for enhanced engine performance.

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.