DSS Racing FX Series Forged +9cc Dome Top Piston Set

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

1-6708-3927 / 2-6708-3927 / 3-6708-3927 / K1-6708-3927 / K2-6708-3927 / K3-6708-3927

Overview:

The DSS Racing FX Series Forged +9cc Dome Top 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 ideal for enthusiasts and professional builders seeking reliable, high-quality components for their small block Mopar Hemi Gen III builds.

With a +9cc dome top design, these pistons increase compression ratios, improving combustion efficiency and power output. Whether you are upgrading your engine for street performance, racing, or heavy-duty applications, this piston set offers a precise fit and robust construction to meet demanding conditions.

Key Features:

These pistons incorporate advanced design and manufacturing techniques to deliver superior performance and longevity. Key features include:

• Forged construction for maximum strength and durability under high stress
• +9cc dome top design to increase compression ratio and optimize combustion
• 3.927" bore diameter with a pin size of .927" for compatibility with most 5.7L Hemi engines
• Comp height of 1.09" for proper piston-to-deck clearance and engine geometry
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm to accommodate high-performance piston rings
• Compatible with both full-floating and press-fit wrist pins for installation flexibility
• Designed for use with a 4.050" stroke and 6.125" connecting rods, matching stock and aftermarket configurations
• Available in multiple compression volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 10.57:1 to 13.56:1

Construction & Design:

DSS Racing pistons are precision forged from high-grade aluminum alloy, providing an excellent balance of strength, weight, and thermal conductivity. The forging process ensures a dense, uniform grain structure that resists cracking and deformation under extreme heat and pressure.

The dome top design not only increases compression but also promotes efficient flame propagation within the combustion chamber. The pistons feature carefully machined ring grooves and skirt profiles to reduce friction and wear, contributing to longer engine life and improved efficiency.

Installation & Fitment:

This piston set is engineered to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, making it a versatile upgrade for a wide range of applications. Installation requires standard engine assembly procedures, and the pistons are compatible with both full-floating and press-fit wrist pins, allowing for flexibility depending on your build preferences.

Proper ring installation and torque specifications should be followed to ensure optimal performance and reliability. These pistons are designed to work seamlessly with stock or aftermarket connecting rods and crankshafts matching the specified stroke and rod length.

What's Included:

• Set of forged +9cc dome top pistons (quantity as per SKU selection)
• Wrist pins compatible with full-floating or press-fit configurations
• Detailed specifications for bore, stroke, and compression volumes

Ideal For:

This piston set is ideal for automotive enthusiasts, engine builders, and racers looking to upgrade their 5.7L Hemi engines for increased power and durability. It suits street performance builds, mild to moderate forced induction setups, and naturally aspirated engines requiring higher compression ratios. Additionally, it is a reliable choice for restoring or rebuilding Mopar small block Hemi Gen III engines with enhanced performance goals.

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.