DSS Racing FX Series Gen III Hemi Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6840-4100D / 2-6840-4100D / 3-6840-4100D / K1-6840-4100D / K2-6840-4100D / K3-6840-4100D
Overview:
The DSS Racing FX Series Gen III Hemi 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 stock cast pistons. Ideal for enthusiasts and professional builders looking to enhance engine reliability and power output, this piston set ensures consistent performance under extreme conditions.
With a 4.100" bore size and a compact 1.21" compression height, these pistons are optimized for the 378 Small Block Mopar Hemi Gen III platform. The flat-top design with a -1.5cc dish helps achieve precise combustion chamber volumes, supporting a range of compression ratios for various tuning needs.
Key Features:
These forged pistons incorporate advanced engineering and materials to deliver exceptional performance and longevity. Key features include:
- Forged construction for enhanced strength and resistance to detonation
- Flat-top piston design with -1.5cc dish for optimized combustion efficiency
- Pin diameter of .927" compatible with full-floating or press-fit configurations
- Ring groove dimensions of 1.2mm / 1.2mm / 3mm to accommodate high-performance piston rings
- Compression height of 1.21" tailored for Gen III Hemi engine architecture
- Compatible with a 3.578" stroke and 6.243" connecting rods for precise fitment
- Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to support compression ratios from 9.09:1 to 11.23:1
- Designed to fit most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines for versatile application
Construction & Design:
DSS Racing utilizes premium forged aluminum alloy to manufacture these pistons, ensuring superior tensile strength and thermal conductivity. The forging process refines the grain structure of the metal, resulting in pistons that withstand high cylinder pressures and temperatures typical of performance and racing environments.
The pistons feature precision-machined ring grooves and pin bores to maintain tight tolerances and reduce friction. The flat-top design with a slight dish improves combustion efficiency and helps control detonation, making these pistons suitable for both street and track use.
Installation & Fitment:
These pistons are designed as direct replacements for the 6.1L SRT8 Gen III Hemi engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Installation requires standard engine rebuild procedures and may involve balancing and blueprinting to achieve optimal performance. The pistons accommodate either full-floating or press-fit wrist pins, providing flexibility based on builder preference.
Due to their precise dimensions and compatibility with stock components such as rods and crankshaft stroke, these pistons integrate seamlessly into existing engine setups with minimal modifications.
What's Included:
- Set of forged pistons sized for 4.100" bore
- Compatible wrist pin options (full-floating or press-fit)
- Precision-machined ring grooves ready for high-performance piston rings
Ideal For:
This piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 6.1L SRT8 engines. Whether building a street performance engine or a track-focused powerplant, these forged pistons provide the strength and reliability needed to handle increased boost, nitrous, or naturally aspirated power levels.
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 Gen III Hemi Forged Piston Set 4.100" Bore: Chrysler / Dodge / Jeep 6.1L SRT8
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1-6840-4100D DSS Racing 05-10 Chrysler / Dodge / Jeep / Ram 6.1L SRT8 FX Series Gen III Hemi Forged Piston Set. Engineered for high performance, these forged pistons offer exceptional strength and durability for 6.1L SRT8 engines. Featuring a 4.100" bore, flat top design, and precise comp height, they enhance combustion efficiency and power output. Ideal for street or track use, they ensure reliable operation under extreme conditions while maintaining optimal compression ratios. Upgrade your engine with DSS Racing for improved performance and longevity.
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MADE IN THE USA
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DSS Racing FX Series Gen III Hemi Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6840-4100D / 2-6840-4100D / 3-6840-4100D / K1-6840-4100D / K2-6840-4100D / K3-6840-4100D
Overview:
The DSS Racing FX Series Gen III Hemi 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 stock cast pistons. Ideal for enthusiasts and professional builders looking to enhance engine reliability and power output, this piston set ensures consistent performance under extreme conditions.
With a 4.100" bore size and a compact 1.21" compression height, these pistons are optimized for the 378 Small Block Mopar Hemi Gen III platform. The flat-top design with a -1.5cc dish helps achieve precise combustion chamber volumes, supporting a range of compression ratios for various tuning needs.
Key Features:
These forged pistons incorporate advanced engineering and materials to deliver exceptional performance and longevity. Key features include:
- Forged construction for enhanced strength and resistance to detonation
- Flat-top piston design with -1.5cc dish for optimized combustion efficiency
- Pin diameter of .927" compatible with full-floating or press-fit configurations
- Ring groove dimensions of 1.2mm / 1.2mm / 3mm to accommodate high-performance piston rings
- Compression height of 1.21" tailored for Gen III Hemi engine architecture
- Compatible with a 3.578" stroke and 6.243" connecting rods for precise fitment
- Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to support compression ratios from 9.09:1 to 11.23:1
- Designed to fit most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines for versatile application
Construction & Design:
DSS Racing utilizes premium forged aluminum alloy to manufacture these pistons, ensuring superior tensile strength and thermal conductivity. The forging process refines the grain structure of the metal, resulting in pistons that withstand high cylinder pressures and temperatures typical of performance and racing environments.
The pistons feature precision-machined ring grooves and pin bores to maintain tight tolerances and reduce friction. The flat-top design with a slight dish improves combustion efficiency and helps control detonation, making these pistons suitable for both street and track use.
Installation & Fitment:
These pistons are designed as direct replacements for the 6.1L SRT8 Gen III Hemi engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Installation requires standard engine rebuild procedures and may involve balancing and blueprinting to achieve optimal performance. The pistons accommodate either full-floating or press-fit wrist pins, providing flexibility based on builder preference.
Due to their precise dimensions and compatibility with stock components such as rods and crankshaft stroke, these pistons integrate seamlessly into existing engine setups with minimal modifications.
What's Included:
- Set of forged pistons sized for 4.100" bore
- Compatible wrist pin options (full-floating or press-fit)
- Precision-machined ring grooves ready for high-performance piston rings
Ideal For:
This piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 6.1L SRT8 engines. Whether building a street performance engine or a track-focused powerplant, these forged pistons provide the strength and reliability needed to handle increased boost, nitrous, or naturally aspirated power levels.
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.
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.
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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 | |||||