DSS Racing Gen III Hemi FX Series Forged Piston Set
Fits Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6820-4075 / 2-6820-4075 / 3-6820-4075 / K1-6820-4075 / K2-6820-4075 / K3-6820-4075
Overview:
The DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the 6.1L SRT8 engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Designed to handle the rigors of high-performance applications, these pistons offer a perfect balance of strength, durability, and precision fitment. Whether you are rebuilding your engine or upgrading for increased power and reliability, this piston set provides a direct replacement solution that meets or exceeds OEM specifications.
Ideal for enthusiasts and professional builders alike, these pistons are crafted to optimize combustion efficiency and withstand elevated cylinder pressures, making them suitable for street performance, track use, and mild forced induction setups.
Key Features:
Built with advanced engineering and premium materials, the DSS Racing FX Series pistons deliver exceptional performance benefits:
- Compatible with 4.075" bore size for most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
- Forged construction for superior strength and durability under high stress
- Flat top design with a -1.5cc dish to optimize combustion chamber shape
- Comp height of 1.21" for precise piston-to-deck clearance
- Pin diameter of .984" with options for full-floating or press-fit pins
- Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
- Stroke compatibility of 3.578" and connecting rod length of 6.243" for accurate engine geometry
- Available in multiple compression ratios approximately ranging from 9.0:1 to 11.11:1 depending on combustion chamber volume (65cc, 74cc, 85cc)
- Precision machining ensures optimal balance and minimal friction for improved engine efficiency
Construction & Design:
Each piston in the DSS Racing Gen III FX Series set is forged from high-grade aluminum alloy, providing an excellent strength-to-weight ratio essential for high-revving Hemi engines. The forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue. The flat top design with a slight dish improves combustion dynamics, helping to maximize power output while maintaining reliable detonation resistance.
The pistons feature carefully engineered ring grooves and pin bosses to ensure secure ring seating and wrist pin retention, available in either full-floating or press-fit configurations to suit different engine builds and preferences. This attention to detail supports long-term durability and consistent performance under demanding conditions.
Installation & Fitment:
Designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, these pistons simplify the rebuild or upgrade process. Minimal modifications are required when installing, provided the engine block is properly prepared and honed to the specified 4.075" bore size. The choice between full-floating or press-fit wrist pins allows customization based on builder preference and application requirements.
Professional installation is recommended to ensure correct piston ring end gaps, piston deck clearance, and overall engine assembly tolerances are maintained for optimal performance and longevity.
What's Included:
- Set of forged pistons for 4.075" bore size (quantity as per engine requirements)
- Wrist pins (full-floating or press-fit, depending on selected SKU)
- Piston rings compatible with 1.2/1.2/3mm groove dimensions (may be sold separately)
- Installation instructions and technical specifications
Ideal For:
- Engine builders upgrading or rebuilding Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
- Performance enthusiasts seeking enhanced durability and power potential
- Street and track applications requiring reliable forged pistons
- Mild forced induction setups where OEM pistons may not provide sufficient strength
- Anyone needing a high-quality, precision-engineered piston set for Gen III Hemi engines
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 Gen III Hemi FX Series Forged Piston Set 4.075" Bore: Fits most Hemi Models
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1-6820-4075 DSS Racing 05-10 Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Forged Piston Set. DSS Racing's Gen III Hemi FX Series forged pistons deliver exceptional strength and durability for high-performance 6.1L SRT8 engines. Featuring a 4.075" bore, flat top design with -1.5cc dish, and precise ring grooves, these pistons optimize combustion efficiency and power output. The full-floating or press-fit pin options ensure reliable operation under extreme conditions, making them ideal for enthusiasts seeking enhanced engine performance and longevity.
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MADE IN THE USA
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DSS Racing Gen III Hemi FX Series Forged Piston Set
Fits Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6820-4075 / 2-6820-4075 / 3-6820-4075 / K1-6820-4075 / K2-6820-4075 / K3-6820-4075
Overview:
The DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the 6.1L SRT8 engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Designed to handle the rigors of high-performance applications, these pistons offer a perfect balance of strength, durability, and precision fitment. Whether you are rebuilding your engine or upgrading for increased power and reliability, this piston set provides a direct replacement solution that meets or exceeds OEM specifications.
Ideal for enthusiasts and professional builders alike, these pistons are crafted to optimize combustion efficiency and withstand elevated cylinder pressures, making them suitable for street performance, track use, and mild forced induction setups.
Key Features:
Built with advanced engineering and premium materials, the DSS Racing FX Series pistons deliver exceptional performance benefits:
- Compatible with 4.075" bore size for most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
- Forged construction for superior strength and durability under high stress
- Flat top design with a -1.5cc dish to optimize combustion chamber shape
- Comp height of 1.21" for precise piston-to-deck clearance
- Pin diameter of .984" with options for full-floating or press-fit pins
- Ring groove dimensions of 1.2mm/1.2mm/3mm to accommodate high-performance piston rings
- Stroke compatibility of 3.578" and connecting rod length of 6.243" for accurate engine geometry
- Available in multiple compression ratios approximately ranging from 9.0:1 to 11.11:1 depending on combustion chamber volume (65cc, 74cc, 85cc)
- Precision machining ensures optimal balance and minimal friction for improved engine efficiency
Construction & Design:
Each piston in the DSS Racing Gen III FX Series set is forged from high-grade aluminum alloy, providing an excellent strength-to-weight ratio essential for high-revving Hemi engines. The forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue. The flat top design with a slight dish improves combustion dynamics, helping to maximize power output while maintaining reliable detonation resistance.
The pistons feature carefully engineered ring grooves and pin bosses to ensure secure ring seating and wrist pin retention, available in either full-floating or press-fit configurations to suit different engine builds and preferences. This attention to detail supports long-term durability and consistent performance under demanding conditions.
Installation & Fitment:
Designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, these pistons simplify the rebuild or upgrade process. Minimal modifications are required when installing, provided the engine block is properly prepared and honed to the specified 4.075" bore size. The choice between full-floating or press-fit wrist pins allows customization based on builder preference and application requirements.
Professional installation is recommended to ensure correct piston ring end gaps, piston deck clearance, and overall engine assembly tolerances are maintained for optimal performance and longevity.
What's Included:
- Set of forged pistons for 4.075" bore size (quantity as per engine requirements)
- Wrist pins (full-floating or press-fit, depending on selected SKU)
- Piston rings compatible with 1.2/1.2/3mm groove dimensions (may be sold separately)
- Installation instructions and technical specifications
Ideal For:
- Engine builders upgrading or rebuilding Chrysler / Dodge / Jeep / Ram 6.1L SRT8 engines
- Performance enthusiasts seeking enhanced durability and power potential
- Street and track applications requiring reliable forged pistons
- Mild forced induction setups where OEM pistons may not provide sufficient strength
- Anyone needing a high-quality, precision-engineered piston set for Gen III Hemi engines
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 | |||||