DSS Racing Forged +4cc Dome Top Piston Set

Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Engines

1-6807-4055 / 2-6807-4055 / 3-6807-4055 / K1-6807-4055 / K2-6807-4055 / K3-6807-4055

Overview:

The DSS Racing Forged +4cc Dome Top Piston Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.1L SRT8 engine. Designed to enhance engine performance and durability, these pistons are an ideal upgrade for enthusiasts seeking improved combustion efficiency and increased compression ratios. Crafted for the 418 Small Block Mopar Hemi Gen III platform, this piston set offers a precise fit and reliable operation under high-stress conditions.

Whether you are rebuilding your engine or upgrading for higher horsepower applications, these forged pistons provide the strength and design features necessary to withstand aggressive driving and racing environments.

Key Features:

These pistons incorporate advanced design elements and manufacturing techniques to deliver superior performance and longevity:

• +4cc dome top design to increase compression ratio and improve combustion efficiency
• Compatible with 4.055" bore size for exact fitment in 6.1L SRT8 engines
• Forged construction for enhanced strength and durability under high load
• Pin diameter of .927" with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
• Comp height of 1.09" optimized for stock and modified engine builds
• Designed for use with a 4.050" stroke and 6.125" connecting rods
• Available in multiple combustion chamber volume options (65cc, 74cc, 85cc) to tailor compression ratios from approximately 10.57:1 to 13.32:1

Construction & Design:

DSS Racing pistons are precision forged from high-grade aluminum alloy, ensuring exceptional strength-to-weight ratio and resistance to thermal expansion. The dome top design increases the compression ratio, which can lead to improved power output and throttle response. The pistons are CNC-machined to exacting tolerances, guaranteeing consistent performance and compatibility with the 6.1L SRT8 engine’s specifications.

The option for full-floating or press-fit wrist pins allows customization based on engine build preferences and intended use. The ring grooves are engineered to maintain ring seal integrity under extreme conditions, reducing blow-by and oil consumption.

Installation & Fitment:

This piston set is designed as a direct fit for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.1L SRT8 engine, ensuring straightforward installation with minimal modifications. Proper engine assembly practices, including precise ring end gap setting and piston orientation, are recommended to maximize performance and longevity. These pistons are suitable for both rebuilds and performance upgrades, compatible with stock and aftermarket components that match the specified bore and stroke dimensions.

What's Included:

• Set of forged +4cc dome top pistons (quantity as per engine requirements)
• Wrist pins (full-floating or press-fit options depending on SKU)
• Optional piston rings (check specific SKU details)
• Installation guidelines and technical specifications

Ideal For:

This piston set is ideal for performance enthusiasts, engine builders, and racers who demand increased compression and durability from their 6.1L SRT8 engines. It suits applications ranging from street performance upgrades to track and drag racing builds, providing a reliable foundation for enhanced horsepower and torque output.

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.