DSS Racing Gen III Hemi FX Series Forged Piston Set

Chrysler / Dodge / Jeep / Ram 6.1L SRT8

1-6807-4075 / 2-6807-4075 / 3-6807-4075 / K1-6807-4075 / K2-6807-4075 / K3-6807-4075

Overview:

The DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines. Designed to handle the demands of high-performance applications, these pistons offer superior strength and durability compared to factory cast pistons. Whether you are building a street performance engine or a race-ready powerplant, this piston set provides the reliability and precision needed to maximize engine output and longevity.

These pistons feature a forged construction optimized for the Gen III Hemi architecture, ensuring excellent resistance to heat and stress under extreme conditions. With a 4.075" bore size and a comp height of 1.09", they fit most 6.1L SRT8 blocks, making them a versatile upgrade for enthusiasts looking to improve their engine’s performance and durability.

Key Features:

Built for strength and precision, the DSS Racing FX Series pistons include a range of features designed to enhance engine performance and reliability:

• Forged 423 Small Block Mopar Hemi Gen III construction for maximum strength
• 4.075" bore size compatible with most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
• Comp height of 1.09" with a +4cc dome top for optimized combustion chamber volume
• Pin diameter of .927" available in full-floating or press-fit options
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
• Stroke compatibility of 4.050" and connecting rod length of 6.125"
• Available in multiple dome volumes (65cc, 74cc, 85cc) to tailor compression ratios from 10.68 to 13.47
• Precision machining ensures tight tolerances and excellent balance

Construction & Design:

Each piston in the DSS Racing FX Series is crafted from high-grade forged aluminum alloy, providing an ideal balance of lightweight strength and thermal conductivity. The forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and deformation under high cylinder pressures and temperatures.

The dome top design with varying volumes allows builders to fine-tune compression ratios to suit different fuel types and performance goals. The pistons are engineered with precise ring grooves and pin bosses to accommodate either full-floating or press-fit wrist pins, offering flexibility depending on engine build preferences.

Installation & Fitment:

These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 Gen III Hemi engines with a 4.075" bore. Installation requires standard engine assembly procedures and proper ring end gap setting. Depending on the wrist pin option selected, either full-floating or press-fit installation techniques will apply. No major block modifications are typically necessary, making these pistons a straightforward upgrade for performance rebuilds or engine refreshes.

What's Included:

• Set of 8 forged pistons (4.075" bore)
• Choice of full-floating or press-fit wrist pins (.927" diameter)
• Precision-machined ring grooves for 1.2/1.2/3mm piston rings
• Documentation with specifications and installation guidelines

Ideal For:

This piston set is ideal for automotive enthusiasts, engine builders, and racers upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 6.1L SRT8 engines. It suits applications ranging from street performance to track and drag racing where enhanced durability and higher compression ratios are desired. The versatility in dome volume options allows customization for various fuel types and tuning strategies.

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.