DSS Racing FX Series Forged Piston Set
Chrysler / Dodge / Jeep / Ram 6.1L SRT8
1-6847-4075D / 2-6847-4075D / 3-6847-4075D / K1-6847-4075D / K2-6847-4075D / K3-6847-4075D
Overview:
The DSS Racing FX Series Forged Piston Set is engineered specifically for the 6.1L Gen III Hemi engines found in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models. Designed to handle high-performance demands, these pistons offer enhanced strength and durability over stock cast pistons, making them an excellent upgrade for enthusiasts seeking improved engine reliability and power potential. Whether you are building a street performance engine or a track-focused powerplant, these forged pistons provide the foundation for consistent, high-output operation.
With a compact dome top design and precise dimensions tailored to the 373 Small Block Mopar Hemi Gen III, this piston set ensures optimal combustion chamber volume and compression ratios, supporting a variety of tuning and build configurations.
Key Features:
These DSS Racing forged pistons incorporate advanced engineering and materials to deliver superior performance and longevity. Key features include:
- Forged construction for enhanced strength and resistance to detonation
- FX Series design optimized for the 6.1L Gen III Hemi engine architecture
- Compact dome top with +4cc volume to support various compression ratios
- Pin diameter of .927" compatible with full-floating or press-fit wrist pins
- Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
- Stroke compatibility of 3.578" and rod length of 6.243" for precise fitment
- Available in multiple dome volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.54 to 12.0
- Designed to fit most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models without modification
Construction & Design:
DSS Racing utilizes premium forged aluminum alloy in the FX Series pistons, delivering a lightweight yet incredibly robust component capable of withstanding the high cylinder pressures typical of performance Hemi engines. The pistons feature a carefully engineered dome shape that optimizes combustion efficiency and supports a range of compression ratios to suit different power goals and fuel types.
Precision machining ensures tight tolerances for ring grooves and pin bores, contributing to reduced friction and improved sealing. The pistons are compatible with both full-floating and press-fit wrist pins, allowing flexibility in engine assembly preferences.
Installation & Fitment:
These pistons are designed as direct replacements for the factory pistons in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, requiring no custom modifications for proper installation. Their dimensions and design maintain factory clearances and compatibility with existing rods and cylinder bores, simplifying the rebuild or upgrade process.
Professional installation is recommended to ensure correct ring end gap, piston orientation, and torque specifications are met for optimal performance and longevity.
What's Included:
- Set of forged DSS Racing FX Series pistons (quantity as per engine requirements)
- Compatible wrist pin options (full-floating or press-fit, depending on selection)
- Detailed specifications and installation guidelines
Ideal For:
This piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding their 6.1L Gen III Hemi engines. It suits applications ranging from street performance and daily driving to high-output track and drag racing builds where increased strength, reliability, and compression tuning flexibility are essential.
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.
DSS Racing FX Series Forged Piston Set: Fits Dodge / Chrysler / Jeep 6.1L Gen III Hemi
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1-6847-4075D / 2-6847-4075D / 3-6847-4075D / K1-6847-4075D / K2-6847-4075D / K3-6847-4075D DSS Racing 05-10 Chrysler / Dodge / Jeep / Ram 6.1L SRT8 FX Series Forged Piston Set. Designed for the 6.1L Gen III Hemi engines, these forged pistons offer enhanced strength and durability with a +4cc dome top and precise comp height of 1.21. Featuring full-floating or press-fit pin options and optimized ring grooves, they deliver improved combustion efficiency and reliability under high-performance conditions. Ideal for enthusiasts seeking to boost power and engine longevity in their SRT8 models.
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MADE IN THE USA
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DSS Racing FX Series Forged Piston Set
Chrysler / Dodge / Jeep / Ram 6.1L SRT8
1-6847-4075D / 2-6847-4075D / 3-6847-4075D / K1-6847-4075D / K2-6847-4075D / K3-6847-4075D
Overview:
The DSS Racing FX Series Forged Piston Set is engineered specifically for the 6.1L Gen III Hemi engines found in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models. Designed to handle high-performance demands, these pistons offer enhanced strength and durability over stock cast pistons, making them an excellent upgrade for enthusiasts seeking improved engine reliability and power potential. Whether you are building a street performance engine or a track-focused powerplant, these forged pistons provide the foundation for consistent, high-output operation.
With a compact dome top design and precise dimensions tailored to the 373 Small Block Mopar Hemi Gen III, this piston set ensures optimal combustion chamber volume and compression ratios, supporting a variety of tuning and build configurations.
Key Features:
These DSS Racing forged pistons incorporate advanced engineering and materials to deliver superior performance and longevity. Key features include:
- Forged construction for enhanced strength and resistance to detonation
- FX Series design optimized for the 6.1L Gen III Hemi engine architecture
- Compact dome top with +4cc volume to support various compression ratios
- Pin diameter of .927" compatible with full-floating or press-fit wrist pins
- Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing
- Stroke compatibility of 3.578" and rod length of 6.243" for precise fitment
- Available in multiple dome volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.54 to 12.0
- Designed to fit most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 models without modification
Construction & Design:
DSS Racing utilizes premium forged aluminum alloy in the FX Series pistons, delivering a lightweight yet incredibly robust component capable of withstanding the high cylinder pressures typical of performance Hemi engines. The pistons feature a carefully engineered dome shape that optimizes combustion efficiency and supports a range of compression ratios to suit different power goals and fuel types.
Precision machining ensures tight tolerances for ring grooves and pin bores, contributing to reduced friction and improved sealing. The pistons are compatible with both full-floating and press-fit wrist pins, allowing flexibility in engine assembly preferences.
Installation & Fitment:
These pistons are designed as direct replacements for the factory pistons in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, requiring no custom modifications for proper installation. Their dimensions and design maintain factory clearances and compatibility with existing rods and cylinder bores, simplifying the rebuild or upgrade process.
Professional installation is recommended to ensure correct ring end gap, piston orientation, and torque specifications are met for optimal performance and longevity.
What's Included:
- Set of forged DSS Racing FX Series pistons (quantity as per engine requirements)
- Compatible wrist pin options (full-floating or press-fit, depending on selection)
- Detailed specifications and installation guidelines
Ideal For:
This piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding their 6.1L Gen III Hemi engines. It suits applications ranging from street performance and daily driving to high-output track and drag racing builds where increased strength, reliability, and compression tuning flexibility are essential.
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.
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YEARMAKEMODELSUBMODEL2006 - 2010Chrysler300C6.1L SRT82008 - 2010DodgeChallenger6.1L SRT82006 - 2010DodgeCharger6.1L SRT82006 - 2008DodgeMagnum6.1L SRT82006 - 2010JeepGrand Cherokee6.1L SRT8
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Standard shipping
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
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Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
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Compression Ratio Calculator
Calculate your engine's compression ratio and CID
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Features Piston Series E SeriesE SX SeriesSX 1-FX Series1-FX 2-FX Series2-FX 3-FX Series3-FX Broached pin oiling slots Drilled, forced wrist pin oiling Forged drain-back windows Drilled bottom ring land intersecting oil groove drain-backs Slightly larger, deeper valve reliefs than OEM CNC machined valve reliefs for moderate performance heads and cam combinations Larger, deeper CNC valve reliefs for more aggressive cylinder head and cam combinations Premium Aircraft spec. 4032 low expansion alloy Premium Aircraft spec. 2618 alloy Blower, Turbo, NOS ready Brushed piston crown Additional CNC milling for weight reduction Patented "X Groove" skirt for superior cylinder and ring life Thinner/shallower ring grooves for max ring seal Low volume contact reduction grooves 2nd ring land accumulator groove prevents flutter 3rd ring land scraper relief Oil ring groove relief reservoir Inner and outer pin boss weight reduction Tighter crown thickness control for lighter parts Dynamic skirt milling for consistent weight Diamond-turned high strength skirts High-strength piston pins Extreme Duty XR wrist pins Horizontal Gas Ports enhance ring seal Forged and machined in the USA
Standard shipping
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Free Easy Returns
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
Compression Ratio Calculator
Calculate your engine's compression ratio and CID
| Features | Piston Series | ||||
|---|---|---|---|---|---|
| E SeriesE | SX SeriesSX | 1-FX Series1-FX | 2-FX Series2-FX | 3-FX Series3-FX | |
| Broached pin oiling slots | |||||
| Drilled, forced wrist pin oiling | |||||
| Forged drain-back windows | |||||
| Drilled bottom ring land intersecting oil groove drain-backs | |||||
| Slightly larger, deeper valve reliefs than OEM | |||||
| CNC machined valve reliefs for moderate performance heads and cam combinations | |||||
| Larger, deeper CNC valve reliefs for more aggressive cylinder head and cam combinations | |||||
| Premium Aircraft spec. 4032 low expansion alloy | |||||
| Premium Aircraft spec. 2618 alloy | |||||
| Blower, Turbo, NOS ready | |||||
| Brushed piston crown | |||||
| Additional CNC milling for weight reduction | |||||
| Patented "X Groove" skirt for superior cylinder and ring life | |||||
| Thinner/shallower ring grooves for max ring seal | |||||
| Low volume contact reduction grooves | |||||
| 2nd ring land accumulator groove prevents flutter | |||||
| 3rd ring land scraper relief | |||||
| Oil ring groove relief reservoir | |||||
| Inner and outer pin boss weight reduction | |||||
| Tighter crown thickness control for lighter parts | |||||
| Dynamic skirt milling for consistent weight | |||||
| Diamond-turned high strength skirts | |||||
| High-strength piston pins | |||||
| Extreme Duty XR wrist pins | |||||
| Horizontal Gas Ports enhance ring seal | |||||
| Forged and machined in the USA | |||||