DSS Racing FX Series Forged Flat Top Pistons Set
Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models
1-6720-3917 / 2-6720-3917 / 3-6720-3917 / K1-6720-3917 / K2-6720-3917 / K3-6720-3917
Overview:
The DSS Racing FX Series Forged Flat Top Pistons Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Hemi engine. Designed to meet the demands of high-performance applications, these pistons offer a reliable upgrade for enthusiasts seeking enhanced durability and precision. Whether you are rebuilding your engine or upgrading for increased power and efficiency, this piston set delivers consistent performance and long-lasting strength.
Built to exacting standards, these pistons are ideal for street performance, mild racing, and heavy-duty use. Their flat top design optimizes combustion chamber dynamics, contributing to improved throttle response and power delivery.
Key Features:
The DSS Racing FX Series pistons combine advanced engineering with quality materials to provide superior performance and reliability. Key features include:
- Forged construction for maximum strength and durability under high stress
- Flat top piston design with -1.5cc volume for optimized combustion efficiency
- Comp height of 1.21 inches, engineered for precise piston-to-head clearance
- .945-inch wrist pin diameter available in full-floating or press-fit options
- Ring groove dimensions of 1.2mm / 1.2mm / 3mm to accommodate high-performance piston rings
- Compatible with 3.578-inch stroke crankshafts and 6.243-inch connecting rods
- Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from 8.45:1 to 10.44:1
- Precision machining ensures consistent weight and balance for smooth engine operation
Construction & Design:
These pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight strength and thermal conductivity. The forging process enhances the metal’s grain structure, resulting in superior resistance to cracking and deformation under extreme heat and pressure. The flat top design reduces detonation risk while maintaining efficient combustion chamber shape.
Each piston features carefully engineered ring grooves and pin bosses to ensure optimal sealing and wrist pin retention. The option for full-floating or press-fit wrist pins allows customization based on engine build preferences and intended use.
Installation & Fitment:
The DSS Racing FX Series pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, making installation straightforward with minimal modifications required. Proper ring end gap and clearance checks are recommended during assembly to ensure optimal performance and longevity. These pistons fit engines with a 3.578-inch stroke and 6.243-inch connecting rods, matching factory specifications for seamless integration.
What's Included:
- Set of forged flat top pistons (quantity as per engine requirements)
- Wrist pins (.945" diameter), available in full-floating or press-fit configurations
- Precision-machined ring grooves ready to accept piston rings (rings not included)
- Installation guidelines and specifications
Ideal For:
This piston set is ideal for automotive enthusiasts, engine builders, and performance tuners looking to upgrade or rebuild Chrysler, Dodge, Jeep, or Ram 5.7L Hemi engines. Whether for street performance, mild racing, or heavy-duty applications, these pistons provide a durable and reliable foundation for increased power and engine 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 FX Series Forged Flat Top Pistons Set: Fits Chrysler / Dodge / Jeep / Ram 5.7L Hemi
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1-6720-3917 DSS Racing 05-23 Chrysler / Dodge / Jeep / Ram 5.7L Hemi FX Series Forged Flat Top Pistons Set. FX Series Forged Flat Top Pistons deliver exceptional strength and durability for your 5.7L Hemi engine. Designed with a -1.5cc flat top and precise comp height, these pistons optimize combustion efficiency and power output. Featuring full-floating or press-fit pins and tight ring grooves, they ensure reliable performance under high stress. Ideal for enthusiasts seeking enhanced engine response and longevity in Chrysler, Dodge, Jeep, and Ram applications.
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MADE IN THE USA
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DSS Racing FX Series Forged Flat Top Pistons Set
Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models
1-6720-3917 / 2-6720-3917 / 3-6720-3917 / K1-6720-3917 / K2-6720-3917 / K3-6720-3917
Overview:
The DSS Racing FX Series Forged Flat Top Pistons Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Hemi engine. Designed to meet the demands of high-performance applications, these pistons offer a reliable upgrade for enthusiasts seeking enhanced durability and precision. Whether you are rebuilding your engine or upgrading for increased power and efficiency, this piston set delivers consistent performance and long-lasting strength.
Built to exacting standards, these pistons are ideal for street performance, mild racing, and heavy-duty use. Their flat top design optimizes combustion chamber dynamics, contributing to improved throttle response and power delivery.
Key Features:
The DSS Racing FX Series pistons combine advanced engineering with quality materials to provide superior performance and reliability. Key features include:
- Forged construction for maximum strength and durability under high stress
- Flat top piston design with -1.5cc volume for optimized combustion efficiency
- Comp height of 1.21 inches, engineered for precise piston-to-head clearance
- .945-inch wrist pin diameter available in full-floating or press-fit options
- Ring groove dimensions of 1.2mm / 1.2mm / 3mm to accommodate high-performance piston rings
- Compatible with 3.578-inch stroke crankshafts and 6.243-inch connecting rods
- Available in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from 8.45:1 to 10.44:1
- Precision machining ensures consistent weight and balance for smooth engine operation
Construction & Design:
These pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight strength and thermal conductivity. The forging process enhances the metal’s grain structure, resulting in superior resistance to cracking and deformation under extreme heat and pressure. The flat top design reduces detonation risk while maintaining efficient combustion chamber shape.
Each piston features carefully engineered ring grooves and pin bosses to ensure optimal sealing and wrist pin retention. The option for full-floating or press-fit wrist pins allows customization based on engine build preferences and intended use.
Installation & Fitment:
The DSS Racing FX Series pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, making installation straightforward with minimal modifications required. Proper ring end gap and clearance checks are recommended during assembly to ensure optimal performance and longevity. These pistons fit engines with a 3.578-inch stroke and 6.243-inch connecting rods, matching factory specifications for seamless integration.
What's Included:
- Set of forged flat top pistons (quantity as per engine requirements)
- Wrist pins (.945" diameter), available in full-floating or press-fit configurations
- Precision-machined ring grooves ready to accept piston rings (rings not included)
- Installation guidelines and specifications
Ideal For:
This piston set is ideal for automotive enthusiasts, engine builders, and performance tuners looking to upgrade or rebuild Chrysler, Dodge, Jeep, or Ram 5.7L Hemi engines. Whether for street performance, mild racing, or heavy-duty applications, these pistons provide a durable and reliable foundation for increased power and engine 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.
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YEARMAKEMODELSUBMODEL2011 - 2024Chrysler3005.7L Hemi2005 - 2010Chrysler300C5.7L Hemi2009 - 2023DodgeChallenger5.7L Hemi2005 - 2023DodgeCharger5.7L Hemi2005 - 2011DodgeDakota5.7L Hemi2004 - 2025DodgeDurango5.7L Hemi2005 - 2008DodgeMagnum5.7L Hemi2002 - 2010DodgeRam5.7L Hemi2005 - 2010JeepCommander5.7L Hemi2005 - 2025JeepGrand Cherokee5.7L Hemi2022 - 2024JeepWagoneer5.7L Hemi2011 - 2024Ram15005.7L Hemi2019 - 2024Ram1500 Classic5.7L Hemi2010 - 2025Ram25005.7L Hemi2011 - 2012Ram35005.7L Hemi
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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 | |||||