DSS Racing Forged Piston Set

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

1-6728-3957 / 2-6728-3957 / 3-6728-3957 / K1-6728-3957 / K2-6728-3957 / K3-6728-3957

Overview:

The DSS Racing +9cc Dome Top Forged Piston Set is engineered specifically for the 5.7L Hemi engines found in many Chrysler, Dodge, Jeep, and Ram vehicles. Designed to enhance engine performance and durability, these pistons are an ideal upgrade for enthusiasts seeking improved compression ratios and reliable power gains. Whether you are rebuilding your engine or upgrading for higher performance applications, this piston set offers a precision fit and robust construction to meet demanding conditions.

With a bore size of 3.957" and a dome volume of +9cc, these pistons help optimize combustion efficiency and power output. They are compatible with the 352 Small Block Mopar Hemi Gen III, FX series, and feature a compact compression height of 1.21" to maintain proper piston-to-head clearance.

Key Features:

These DSS Racing pistons incorporate advanced design elements to deliver superior performance and reliability:

• +9cc dome top design for increased compression and combustion efficiency
• Forged construction for enhanced strength and durability under high stress
• Compatible with full-floating or press-fit wrist pins (.945" PIN diameter)
• Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for optimal sealing
• Designed for a 3.578" stroke and 6.243" connecting rod length
• Available in multiple compression volumes to suit different build requirements (65cc, 74cc, 85cc)
• Precision machined to fit 3.957" bore diameter for most 5.7L Hemi engines
• Compatible with Mopar Gen III and FX engine platforms

Construction & Design:

Manufactured from high-grade forged aluminum alloy, these pistons provide exceptional strength-to-weight ratio, reducing reciprocating mass while maintaining durability. The dome top design is carefully engineered to increase compression ratio without compromising piston-to-valve clearance. The pistons feature tight tolerances and a smooth finish to ensure optimal ring sealing and reduced friction.

The wrist pin design supports either full-floating or press-fit configurations, allowing flexibility depending on engine build preferences. Ring grooves are precision cut to accommodate standard 1.2mm compression rings and a 3mm oil ring, ensuring effective sealing and oil control under high-performance conditions.

Installation & Fitment:

This piston set is designed as a direct fit for most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines with a 3.957" bore. Installation requires standard engine rebuilding procedures, including proper honing and cleaning of the cylinder bores. The pistons’ compact compression height of 1.21" ensures compatibility with stock or aftermarket cylinder heads without the need for extensive modifications.

It is recommended to verify piston-to-valve clearance and ring end gaps during installation. These pistons are suitable for both rebuilds and performance upgrades, providing a reliable foundation for increased power output and engine longevity.

What's Included:

• Set of forged +9cc dome top pistons (quantity as per engine requirements)
• Wrist pins compatible with full-floating or press-fit installation
• Precision-cut piston rings sized 1.2/1.2/3mm for compression and oil control

Ideal For:

This piston set is ideal for automotive enthusiasts, engine builders, and performance tuners working on Chrysler, Dodge, Jeep, or Ram vehicles equipped with the 5.7L Hemi engine. It suits applications ranging from street performance upgrades to moderate racing builds where increased compression and durability are desired. Whether restoring a classic Mopar Hemi or enhancing a modern engine, these pistons provide a solid foundation for improved power and reliability.

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.