DSS Racing FX Series Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6820-4065 / 2-6820-4065 / 3-6820-4065 / K1-6820-4065 / K2-6820-4065 / K3-6820-4065
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 meet the demands of high-performance builds, these pistons deliver exceptional strength and durability while maintaining precise fitment and optimal combustion characteristics. Whether you are rebuilding your engine or upgrading for increased power and reliability, this piston set offers a reliable foundation for your performance goals.
These pistons are ideal for enthusiasts and professional builders seeking a high-quality forged piston solution that balances lightweight design with robust construction. The set is compatible with the 371 Small Block Mopar Hemi Gen III platform and is tailored to maintain factory-like compression ratios with options to suit various combustion chamber volumes.
Key Features:
Built with advanced engineering and precision manufacturing, the DSS Racing FX Series pistons include the following features:
- Compatible with 4.065" bore size for most 6.1L SRT8 engines
- Forged construction for superior strength and durability under high stress
- Flat top piston design with a -1.5cc dish for optimized combustion
- Comp height of 1.21" for precise piston-to-deck clearance
- .984" wrist pin diameter with options for full-floating or press-fit pins
- Ring groove dimensions of 1.2mm top and second rings, 3mm oil ring for effective sealing
- Stroke compatibility of 3.578" and connecting rod length of 6.243" for balanced engine geometry
- Available compression ratio options approximately 11.06:1 (65cc), 9.99:1 (74cc), and 8.95:1 (85cc) to suit different build requirements
Construction & Design:
The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent strength-to-weight ratio essential for high-performance applications. The forging process enhances the metal’s grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under extreme operating conditions.
Each piston is precision-machined to exact tolerances, ensuring consistent ring groove dimensions and piston skirt finish for reduced friction and improved wear resistance. The flat top design with a slight dish optimizes combustion efficiency and helps maintain factory compression ratios, making these pistons suitable for both naturally aspirated and forced induction setups.
Installation & Fitment:
Designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, these pistons require minimal modifications during installation. The set supports both full-floating and press-fit wrist pin configurations, allowing flexibility depending on your engine build preferences.
Proper ring end gap and piston-to-wall clearance should be verified during installation to ensure optimal performance and longevity. These pistons are compatible with the 371 Small Block Mopar Hemi Gen III platform, making them a straightforward upgrade or rebuild component for enthusiasts and professional engine builders alike.
What's Included:
- Set of forged pistons (quantity as required for engine configuration)
- Wrist pins compatible with full-floating or press-fit installation
- Precision-machined piston rings with specified groove dimensions
- Installation guidelines and specifications for compression ratios and clearances
Ideal For:
This piston set is perfect for performance enthusiasts, professional engine builders, and racers who demand reliable, high-strength components for their 6.1L SRT8 engines. Whether you are performing a high-performance rebuild, upgrading for forced induction, or seeking improved durability for street or track use, the DSS Racing FX Series pistons provide a solid foundation for enhanced engine performance and longevity.
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 4.065" Bore: Chrysler / Dodge / Jeep (6.1L SRT8)
- Unit price
- /per
What does the Available to Promise date mean?
ETA stands for Estimated Time of Arrival. The date shown is calculated using our Available-to-Promise (ATP) system, which tracks real-time supplier commitments to determine when a product is expected to be available for delivery. Specifically, the date is calculated by adding 9 business days from the date a supplier has committed to ship the product, representing a worst-case scenario for when we can expect to receive inventory.
Please note: The ETA is an estimate, not a guarantee. While we work closely with our suppliers to keep dates as accurate as possible, delays due to shipping carriers, weather, customs, or supplier-side issues may occasionally push the actual arrival beyond the date shown. Likewise, inventory may arrive sooner than the ETA in many cases. If you would like to be notified for when this item arrives, sign up for our back in stock notifications!
1-6820-4065 DSS Racing 05-10 Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Gen III Hemi FX Series Forged Piston Set. Engineered for high-performance applications, these forged pistons offer superior strength and durability with a 4.065" bore size. Featuring a -1.5cc flat top design and full-floating or press-fit pin options, they optimize combustion efficiency and power output. Ideal for 6.1L SRT8 engines, this set ensures reliable performance under extreme conditions while maintaining precise fitment and enhanced compression ratios for improved throttle response and longevity.
FREE GROUND SHIPPING
MADE IN THE USA
Adding product to your cart
DSS Racing FX Series Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6820-4065 / 2-6820-4065 / 3-6820-4065 / K1-6820-4065 / K2-6820-4065 / K3-6820-4065
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 meet the demands of high-performance builds, these pistons deliver exceptional strength and durability while maintaining precise fitment and optimal combustion characteristics. Whether you are rebuilding your engine or upgrading for increased power and reliability, this piston set offers a reliable foundation for your performance goals.
These pistons are ideal for enthusiasts and professional builders seeking a high-quality forged piston solution that balances lightweight design with robust construction. The set is compatible with the 371 Small Block Mopar Hemi Gen III platform and is tailored to maintain factory-like compression ratios with options to suit various combustion chamber volumes.
Key Features:
Built with advanced engineering and precision manufacturing, the DSS Racing FX Series pistons include the following features:
- Compatible with 4.065" bore size for most 6.1L SRT8 engines
- Forged construction for superior strength and durability under high stress
- Flat top piston design with a -1.5cc dish for optimized combustion
- Comp height of 1.21" for precise piston-to-deck clearance
- .984" wrist pin diameter with options for full-floating or press-fit pins
- Ring groove dimensions of 1.2mm top and second rings, 3mm oil ring for effective sealing
- Stroke compatibility of 3.578" and connecting rod length of 6.243" for balanced engine geometry
- Available compression ratio options approximately 11.06:1 (65cc), 9.99:1 (74cc), and 8.95:1 (85cc) to suit different build requirements
Construction & Design:
The DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent strength-to-weight ratio essential for high-performance applications. The forging process enhances the metal’s grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under extreme operating conditions.
Each piston is precision-machined to exact tolerances, ensuring consistent ring groove dimensions and piston skirt finish for reduced friction and improved wear resistance. The flat top design with a slight dish optimizes combustion efficiency and helps maintain factory compression ratios, making these pistons suitable for both naturally aspirated and forced induction setups.
Installation & Fitment:
Designed as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, these pistons require minimal modifications during installation. The set supports both full-floating and press-fit wrist pin configurations, allowing flexibility depending on your engine build preferences.
Proper ring end gap and piston-to-wall clearance should be verified during installation to ensure optimal performance and longevity. These pistons are compatible with the 371 Small Block Mopar Hemi Gen III platform, making them a straightforward upgrade or rebuild component for enthusiasts and professional engine builders alike.
What's Included:
- Set of forged pistons (quantity as required for engine configuration)
- Wrist pins compatible with full-floating or press-fit installation
- Precision-machined piston rings with specified groove dimensions
- Installation guidelines and specifications for compression ratios and clearances
Ideal For:
This piston set is perfect for performance enthusiasts, professional engine builders, and racers who demand reliable, high-strength components for their 6.1L SRT8 engines. Whether you are performing a high-performance rebuild, upgrading for forced induction, or seeking improved durability for street or track use, the DSS Racing FX Series pistons provide a solid foundation for enhanced engine performance and longevity.
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.
-
-
YEARMAKEMODELSUBMODEL2006 - 2010Chrysler300C6.1L SRT82008 - 2010DodgeChallenger6.1L SRT82006 - 2010DodgeCharger6.1L SRT82006 - 2008DodgeMagnum6.1L SRT82006 - 2010JeepGrand Cherokee6.1L SRT8
-
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
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 | |||||