DSS Racing FX Series +4cc Dome Top Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6847-4100D / 2-6847-4100D / 3-6847-4100D / K1-6847-4100D / K2-6847-4100D / K3-6847-4100D
Overview:
The DSS Racing FX Series +4cc Dome Top Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, delivering enhanced performance and reliability. Designed to fit most 6.1L SRT8 models, these pistons are ideal for enthusiasts seeking to upgrade their engine’s durability and compression ratio for improved power output.
Built with precision and attention to detail, this piston set offers a +4cc dome top design that increases the compression ratio, optimizing combustion efficiency. Whether you are rebuilding your engine or upgrading for higher performance applications, these pistons provide a solid foundation for sustained power and longevity.
Key Features:
These forged pistons incorporate advanced design elements and materials to meet the demands of high-performance Mopar Hemi engines:
- Compatible with 378 Small Block Mopar Hemi Gen III engines
- +4cc dome top design for increased compression and power
- Comp height of 1.21 inches for precise piston-to-head clearance
- Pin diameter of .927 inches, available in full-floating or press-fit options
- Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring
- Optimized for a 4.100" bore and 3.578" stroke
- Rod length compatibility of 6.243 inches
- Approximate compression ratios vary by combustion chamber size: 65cc (12.12:1), 74cc (10.84:1), 85cc (9.64:1)
- Durable forged construction for enhanced strength and heat resistance
Construction & Design:
DSS Racing’s FX Series pistons are crafted from high-quality forged aluminum alloy, providing superior strength and thermal conductivity compared to cast pistons. The dome top design increases the compression ratio, improving combustion efficiency and power output without compromising reliability.
The pistons feature precision-machined ring grooves and pin bores to ensure optimal ring seal and wrist pin fitment. The option for full-floating or press-fit pins allows customization based on engine build preferences. This meticulous engineering supports high RPM operation and aggressive driving conditions typical of SRT8 performance applications.
Installation & Fitment:
These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines with a 4.100" bore. Installation requires standard engine rebuild procedures, including proper honing and cleaning of the cylinder bores. The choice between full-floating or press-fit wrist pins should be matched to your engine’s specifications and performance goals.
Due to the increased compression ratio, it is recommended to verify compatibility with your engine’s fuel and tuning setup to avoid detonation. Professional installation is advised to ensure optimal performance and longevity.
What's Included:
- Set of forged +4cc dome top pistons (quantity as per engine requirements)
- Wrist pins (full-floating or press-fit, depending on selected option)
- Circlips or retaining hardware for wrist pins
Ideal For:
This piston set is perfect for Mopar enthusiasts and professional engine builders looking to upgrade or rebuild their 6.1L SRT8 engines. It suits applications ranging from street performance to track use where increased compression and durability are desired. Ideal for those aiming to extract more power while maintaining engine reliability under demanding conditions.
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 +4cc Dome Top Forged Piston Set: Fits Dodge / Chrysler / Jeep 6.1L SRT8
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1-6847-4100D DSS Racing 05-10 Chrysler / Dodge / Jeep / Ram 6.1L SRT8 FX Series +4cc Dome Top Forged Piston Set. Designed for the 378 Small Block Mopar Hemi Gen III, these forged pistons offer a +4cc dome top for increased compression and power. Featuring a 4.100" bore, full-floating or press fit pin options, and precise ring grooves, they deliver durability and performance. Ideal for enthusiasts seeking enhanced combustion efficiency and reliability in high-performance applications.
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MADE IN THE USA
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DSS Racing FX Series +4cc Dome Top Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 6.1L SRT8 Models
1-6847-4100D / 2-6847-4100D / 3-6847-4100D / K1-6847-4100D / K2-6847-4100D / K3-6847-4100D
Overview:
The DSS Racing FX Series +4cc Dome Top Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, delivering enhanced performance and reliability. Designed to fit most 6.1L SRT8 models, these pistons are ideal for enthusiasts seeking to upgrade their engine’s durability and compression ratio for improved power output.
Built with precision and attention to detail, this piston set offers a +4cc dome top design that increases the compression ratio, optimizing combustion efficiency. Whether you are rebuilding your engine or upgrading for higher performance applications, these pistons provide a solid foundation for sustained power and longevity.
Key Features:
These forged pistons incorporate advanced design elements and materials to meet the demands of high-performance Mopar Hemi engines:
- Compatible with 378 Small Block Mopar Hemi Gen III engines
- +4cc dome top design for increased compression and power
- Comp height of 1.21 inches for precise piston-to-head clearance
- Pin diameter of .927 inches, available in full-floating or press-fit options
- Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring
- Optimized for a 4.100" bore and 3.578" stroke
- Rod length compatibility of 6.243 inches
- Approximate compression ratios vary by combustion chamber size: 65cc (12.12:1), 74cc (10.84:1), 85cc (9.64:1)
- Durable forged construction for enhanced strength and heat resistance
Construction & Design:
DSS Racing’s FX Series pistons are crafted from high-quality forged aluminum alloy, providing superior strength and thermal conductivity compared to cast pistons. The dome top design increases the compression ratio, improving combustion efficiency and power output without compromising reliability.
The pistons feature precision-machined ring grooves and pin bores to ensure optimal ring seal and wrist pin fitment. The option for full-floating or press-fit pins allows customization based on engine build preferences. This meticulous engineering supports high RPM operation and aggressive driving conditions typical of SRT8 performance applications.
Installation & Fitment:
These pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines with a 4.100" bore. Installation requires standard engine rebuild procedures, including proper honing and cleaning of the cylinder bores. The choice between full-floating or press-fit wrist pins should be matched to your engine’s specifications and performance goals.
Due to the increased compression ratio, it is recommended to verify compatibility with your engine’s fuel and tuning setup to avoid detonation. Professional installation is advised to ensure optimal performance and longevity.
What's Included:
- Set of forged +4cc dome top pistons (quantity as per engine requirements)
- Wrist pins (full-floating or press-fit, depending on selected option)
- Circlips or retaining hardware for wrist pins
Ideal For:
This piston set is perfect for Mopar enthusiasts and professional engine builders looking to upgrade or rebuild their 6.1L SRT8 engines. It suits applications ranging from street performance to track use where increased compression and durability are desired. Ideal for those aiming to extract more power while maintaining engine reliability under demanding conditions.
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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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 | |||||