DSS Racing FX Series Forged Piston Set

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

1-6718-3917 / 2-6718-3917 / 3-6718-3917 / K1-6718-3917 / K2-6718-3917 / K3-6718-3917

Overview:

The DSS Racing FX Series +9cc Dome Top Forged Piston Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Hemi engine. Designed to replace factory pistons, this set offers enhanced durability and performance for enthusiasts seeking to improve engine strength and compression ratios. Ideal for both street and moderate performance builds, these pistons provide a reliable upgrade that supports higher power outputs while maintaining OEM fitment and reliability.

These pistons are compatible with the 345 Small Block Mopar Hemi Gen III platform and are crafted to exacting standards, ensuring optimal combustion efficiency and longevity under demanding conditions.

Key Features:

Built to deliver superior performance and durability, the DSS Racing FX Series pistons include the following key features:

• +9cc dome top design to increase compression and improve combustion efficiency
• Comp height of 1.21 inches for precise piston-to-head clearance
• .927-inch wrist pin diameter with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm top and second rings, with a 3mm oil ring for optimal sealing and oil control
• Compatible with a 3.578-inch stroke and 6.243-inch connecting rods
• Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.42:1 to 12.06:1
• Forged construction for enhanced strength and resistance to detonation
• Precision machining for consistent weight and balance across the piston set

Construction & Design:

Each piston in the DSS Racing FX Series is forged from high-quality aluminum alloy, providing a superior strength-to-weight ratio compared to cast pistons. The dome top design increases the compression ratio, which can improve power output and throttle response when paired with appropriate tuning. The pistons are engineered with tight tolerances to ensure a perfect fit within the cylinder bore, reducing friction and wear over time.

The wrist pins are designed to accommodate either full-floating or press-fit installation methods, offering flexibility depending on engine build preferences. Additionally, the ring grooves are precisely cut to maintain optimal ring seal and oil control, which is critical for maintaining engine efficiency and longevity.

Installation & Fitment:

This piston set is designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, specifically the 345 Small Block Mopar Hemi Gen III platform. Installation requires standard engine rebuild procedures, including proper honing of cylinder bores and careful measurement of piston-to-wall clearance. No major modifications are typically necessary, but professional installation is recommended to ensure correct piston orientation and ring end gap settings.

What's Included:

• Set of forged +9cc dome top pistons (quantity as required for engine)
• Wrist pins compatible with full-floating or press-fit installation
• Detailed specifications for ring groove dimensions and piston geometry

Ideal For:

This piston set is ideal for automotive enthusiasts and professional builders looking to upgrade the durability and performance of their 5.7L Hemi engines. Whether building a street performance vehicle, a mild race engine, or a reliable daily driver with enhanced compression, these pistons offer a balanced solution for improved power and engine longevity.

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.