DSS Racing FX Series Forged Flat Top Piston Set

Fits Chrysler, Dodge, Jeep, Ram 6.1L SRT8 Models

1-6800-4085 / 2-6800-4085 / 3-6800-4085 / K1-6800-4085 / K2-6800-4085 / K3-6800-4085

Overview:

The DSS Racing FX Series Forged Flat Top Piston Set is engineered specifically for the 6.1L SRT8 engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Designed to meet the demanding needs of performance enthusiasts and professional builders, these pistons offer a perfect balance of strength, durability, and precision fitment. Whether you are rebuilding your engine or upgrading for higher horsepower applications, this piston set provides reliable performance and improved combustion efficiency.

With a bore size of 4.085 inches and a compact flat top design, these pistons optimize compression ratios for enhanced power delivery. They are ideal for those seeking to maintain factory reliability while pushing their Mopar Hemi engines to the next level.

Key Features:

Built with advanced engineering and premium materials, the DSS Racing FX Series pistons include a range of features designed to maximize engine performance and longevity:

• Forged construction for superior strength and resistance to high stress
• Flat top design with a -1.5cc volume for optimized combustion chamber shape
• Comp height of 1.09 inches for precise piston-to-deck clearance
• Pin diameter of .927 inches, compatible with full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
• Designed for a 4.050-inch stroke and 6.125-inch connecting rods
• Available in multiple compression ratios approximately ranging from 10.11 to 12.52
• Specifically engineered for the 425 Small Block Mopar Hemi Gen III platform

Construction & Design:

Each piston in the FX Series is forged from high-quality aluminum alloy, providing an excellent strength-to-weight ratio essential for high-performance applications. The flat top design reduces detonation risk while improving combustion efficiency and power output. The pistons feature precision-machined ring grooves and pin bores to ensure optimal sealing and minimal friction. DSS Racing’s attention to detail in forging and finishing processes guarantees consistent durability and tight tolerances for a perfect fit in the 6.1L SRT8 engine block.

Installation & Fitment:

This piston set is designed as a direct fit for most Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.1L SRT8 engine. Installation requires standard engine rebuild procedures and is compatible with both full-floating and press-fit wrist pin configurations. Builders should verify piston-to-cylinder wall clearance and ring end gaps during assembly to ensure optimal performance and longevity. No major modifications are necessary when replacing factory pistons with this DSS Racing set.

What's Included:

• Set of forged flat top pistons (quantity as required for engine)
• Precision-machined piston pins
• Ring groove compatible with high-performance piston rings (rings not included)

Ideal For:

This piston set is perfect for enthusiasts and professional engine builders upgrading or rebuilding 6.1L SRT8 Mopar Hemi engines. It suits applications ranging from street performance to moderate track use, offering enhanced strength and combustion efficiency without compromising reliability. Ideal for those seeking to increase compression ratios and improve overall engine responsiveness.

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.