DSS Racing FX Series Forged Flat Top Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models

1-6700-3917 / 2-6700-3917 / 3-6700-3917 / K1-6700-3917 / K2-6700-3917 / K3-6700-3917

Overview:

The DSS Racing FX Series Forged Flat Top Piston Set is engineered specifically for the 5.7L Stroker Small Block Mopar Hemi Gen III engines found in most Chrysler, Dodge, Jeep, and Ram vehicles. Designed to handle high-performance demands, these pistons offer enhanced strength and durability for enthusiasts looking to upgrade their engine’s internals. Whether building a street performance engine or a race-ready powerplant, these pistons provide reliable compression and improved combustion efficiency.

With a flat top design and a compact combustion chamber volume, the FX Series pistons help optimize compression ratios for better power output and throttle response. They are ideal for engine builders seeking a balance of performance, reliability, and precision fitment in their 5.7L Hemi builds.

Key Features:

These forged pistons incorporate advanced engineering and quality materials to meet the rigorous demands of high-performance Mopar Hemi engines. Key features include:

• Forged construction for superior strength and durability under high stress
• Flat top piston design with a -1.5cc volume for optimized combustion
• Comp height of 1.09" to maintain proper deck clearance and compression ratio
• Pin diameter of .927" compatible with full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
• Designed for a 4.050" stroke and 6.125" connecting rod length setup
• Available in multiple combustion chamber volumes to suit different compression needs: 65cc (11.67:1), 74cc (10.52:1), and 85cc (9.42:1)
• Precision CNC machining ensures consistent fitment and performance

Construction & Design:

The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent strength-to-weight ratio essential for high-revving engines. The forging process enhances the metal’s grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue. The flat top design promotes efficient combustion and helps maintain a stable flame front within the combustion chamber.

Each piston is engineered with tight tolerances and features ring grooves designed to accommodate performance ring sets, ensuring optimal sealing and reduced blow-by. The pin bosses are reinforced to handle the rigors of full-floating or press-fit wrist pin configurations, giving builders flexibility based on their engine setup preferences.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi Gen III engines, including popular small block stroker builds. Installation requires standard engine assembly procedures, with attention to proper ring end gap and piston-to-wall clearance. The pistons are compatible with a 4.050" stroke crankshaft and 6.125" connecting rods, making them ideal for stroker engine configurations.

Professional installation is recommended to ensure correct torque specifications and clearances are met, maximizing the longevity and performance of the pistons within the engine.

What's Included:

• Set of 8 DSS Racing FX Series Forged Flat Top Pistons
• Wrist pins compatible with full-floating or press-fit installation
• Ring groove machining for 1.2/1.2/3mm ring sets
• Technical specifications and installation guidelines

Ideal For:

This piston set is ideal for engine builders and performance enthusiasts upgrading or rebuilding their 5.7L Hemi Gen III engines. Whether constructing a high-performance street engine, a drag racing powerplant, or an off-road build, these pistons provide the strength and precision needed to handle increased boost, higher compression, and aggressive tuning strategies. They are especially suited for stroker engine configurations requiring durable, lightweight pistons that maintain excellent combustion characteristics.

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.