DSS Racing FX Series +4cc Dome Top Forged Piston Set

Fits Chrysler / Dodge / Jeep / Ram 6.2L Hellcat & Trackhawk

1-6857-4125 / 2-6857-4125 / 3-6857-4125 / K1-6857-4125 / K2-6857-4125 / K3-6857-4125

Overview:

The DSS Racing FX Series +4cc Dome Top Forged Piston Set is engineered specifically for high-performance applications in Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines. Designed to fit a 4.125" bore, these pistons are ideal for enthusiasts and professional builders seeking to enhance engine durability and power output. Featuring a +4cc dome top design, they provide increased compression ratios for improved combustion efficiency and performance gains.

These pistons are compatible with the 383 Small Block Mopar Hemi Gen III platform and are built to withstand the rigors of both street and track use. Whether upgrading a factory engine or building a custom powerplant, the DSS Racing FX Series pistons deliver reliable strength and precision fitment.

Key Features:

Designed with advanced engineering and quality materials, these pistons offer several key benefits:

• +4cc dome top design for increased compression and power potential
• Compatible with 4.125" bore size, ideal for 6.2L Hellcat and Trackhawk engines
• Forged construction for superior strength and durability under high stress
• Comp height of 1.275" optimized for performance builds
• Pin diameter of .945" with options for full-floating or press-fit installation
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
• Designed for use with a 3.578" stroke and 6.2" connecting rods
• Available with various dome volumes to tailor compression ratio: 65cc (12.24:1), 74cc (10.95:1), and 85cc (9.74:1)

Construction & Design:

Each piston in the DSS Racing FX Series is precision forged from high-grade aluminum alloy, ensuring exceptional strength-to-weight ratio and resistance to thermal expansion. The dome top design enhances combustion chamber efficiency by increasing compression without compromising piston integrity. The pistons feature carefully machined ring grooves and pin bores to maintain optimal sealing and reduce friction.

The option for full-floating or press-fit wrist pins allows builders to customize installation based on application requirements. The pistons are engineered to maintain tight tolerances for consistent performance and longevity in demanding environments.

Installation & Fitment:

These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines with a 4.125" bore. Installation requires standard engine assembly procedures, with attention to proper ring end gap and wrist pin fitment based on the chosen configuration. No major modifications are typically necessary, making them suitable for both professional engine builders and experienced enthusiasts.

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)
• Installation instructions and technical specifications

Ideal For:

This piston set is ideal for performance enthusiasts and engine builders upgrading or rebuilding 6.2L Hellcat and Trackhawk engines who want to increase compression and power output while maintaining reliability. It suits applications ranging from street performance to track and racing environments where durability and precision are critical.

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.