DSS Racing FX Series Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models
1-6703-3937 / 2-6703-3937 / 3-6703-3937 / K1-6703-3937 / K2-6703-3937 / K3-6703-3937
Overview:
The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and builders seeking reliable, high-performance pistons for their 5.7L Hemi engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi models, these pistons offer a perfect balance of strength, durability, and precision fitment. Whether you are rebuilding your engine or upgrading for increased power and longevity, this piston set delivers superior performance under demanding conditions.
With a focus on compatibility and performance, these forged pistons are ideal for stroker builds featuring a 4.050" stroke and 6.125" connecting rods, providing enhanced engine displacement and improved combustion efficiency. The pistons are designed to maintain optimal compression ratios across various combustion chamber sizes, ensuring versatility for different engine configurations.
Key Features:
The DSS Racing FX Series Forged Piston Set incorporates advanced design features and high-quality materials to meet the rigorous demands of performance applications:
- Compatible with 394 Small Block Mopar Hemi Gen III engines
- Comp height of 1.09" for precise deck clearance
- 12cc dish top design to optimize combustion chamber volume
- Pin diameter of .927" supporting full-floating or press-fit configurations
- Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
- Designed for a 4.050" stroke and 6.125" connecting rods
- Available compression ratios approximately 10.49:1 (65cc), 9.6:1 (74cc), and 8.68:1 (85cc) to suit various performance needs
- Forged construction for superior strength and durability under high stress
Construction & Design:
These pistons are forged from premium-grade aluminum alloy, providing an excellent strength-to-weight ratio that enhances engine responsiveness and longevity. The forging process ensures a dense, uniform grain structure, reducing the risk of cracking or deformation under extreme heat and pressure. The -12cc dish top design helps control compression and reduce detonation risks, making these pistons suitable for both naturally aspirated and forced induction setups.
The piston pin bore is engineered to accommodate either full-floating or press-fit pins, offering flexibility depending on your engine build preferences. Precision-machined ring grooves ensure optimal ring sealing and reduced blow-by, contributing to improved combustion efficiency and oil control.
Installation & Fitment:
This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines equipped with Gen III small block Mopar Hemi architecture. Installation requires standard engine rebuilding procedures, and the pistons are compatible with a 4.050" stroke crankshaft and 6.125" connecting rods. Due to the forged construction and precise dimensions, minimal modifications are typically needed, but professional installation is recommended to ensure proper clearances and optimal engine performance.
What's Included:
- Set of forged pistons (quantity as per engine requirements)
- Piston pins compatible with full-floating or press-fit installation
- Ring grooves machined for 1.2mm top and second rings, 3mm oil ring
Ideal For:
This piston set is ideal for engine builders, performance enthusiasts, and professional shops upgrading or rebuilding 5.7L Hemi engines for street, strip, or mild racing applications. It suits those looking to increase engine displacement with a stroker setup while maintaining reliable compression ratios and durability under high-performance 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 Forged Piston Set: Fits Chrysler / Dodge / Jeep / Ram 5.7L Hemi (02-26)
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1-6703-3937 DSS Racing 05-23 Chrysler / Dodge / Jeep / Ram 5.7L Hemi FX Series Forged Piston Set. Designed for the Small Block Mopar Hemi Gen III, these forged pistons offer exceptional strength and durability for high-performance builds. Featuring a -12cc dish top and a 1.09" compression height, they optimize combustion efficiency and power output. Compatible with full-floating or press-fit pins, the set supports various ring groove sizes and stroke lengths, ensuring a precise fit. Ideal for enthusiasts seeking reliable, high-quality pistons to enhance engine performance and longevity.
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DSS Racing FX Series Forged Piston Set
Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models
1-6703-3937 / 2-6703-3937 / 3-6703-3937 / K1-6703-3937 / K2-6703-3937 / K3-6703-3937
Overview:
The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and builders seeking reliable, high-performance pistons for their 5.7L Hemi engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi models, these pistons offer a perfect balance of strength, durability, and precision fitment. Whether you are rebuilding your engine or upgrading for increased power and longevity, this piston set delivers superior performance under demanding conditions.
With a focus on compatibility and performance, these forged pistons are ideal for stroker builds featuring a 4.050" stroke and 6.125" connecting rods, providing enhanced engine displacement and improved combustion efficiency. The pistons are designed to maintain optimal compression ratios across various combustion chamber sizes, ensuring versatility for different engine configurations.
Key Features:
The DSS Racing FX Series Forged Piston Set incorporates advanced design features and high-quality materials to meet the rigorous demands of performance applications:
- Compatible with 394 Small Block Mopar Hemi Gen III engines
- Comp height of 1.09" for precise deck clearance
- 12cc dish top design to optimize combustion chamber volume
- Pin diameter of .927" supporting full-floating or press-fit configurations
- Ring groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing
- Designed for a 4.050" stroke and 6.125" connecting rods
- Available compression ratios approximately 10.49:1 (65cc), 9.6:1 (74cc), and 8.68:1 (85cc) to suit various performance needs
- Forged construction for superior strength and durability under high stress
Construction & Design:
These pistons are forged from premium-grade aluminum alloy, providing an excellent strength-to-weight ratio that enhances engine responsiveness and longevity. The forging process ensures a dense, uniform grain structure, reducing the risk of cracking or deformation under extreme heat and pressure. The -12cc dish top design helps control compression and reduce detonation risks, making these pistons suitable for both naturally aspirated and forced induction setups.
The piston pin bore is engineered to accommodate either full-floating or press-fit pins, offering flexibility depending on your engine build preferences. Precision-machined ring grooves ensure optimal ring sealing and reduced blow-by, contributing to improved combustion efficiency and oil control.
Installation & Fitment:
This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines equipped with Gen III small block Mopar Hemi architecture. Installation requires standard engine rebuilding procedures, and the pistons are compatible with a 4.050" stroke crankshaft and 6.125" connecting rods. Due to the forged construction and precise dimensions, minimal modifications are typically needed, but professional installation is recommended to ensure proper clearances and optimal engine performance.
What's Included:
- Set of forged pistons (quantity as per engine requirements)
- Piston pins compatible with full-floating or press-fit installation
- Ring grooves machined for 1.2mm top and second rings, 3mm oil ring
Ideal For:
This piston set is ideal for engine builders, performance enthusiasts, and professional shops upgrading or rebuilding 5.7L Hemi engines for street, strip, or mild racing applications. It suits those looking to increase engine displacement with a stroker setup while maintaining reliable compression ratios and durability under high-performance 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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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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Free Standard Shipping on orders over $250. Select “Free Shipping” at checkout.
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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 $250. Select “Free Shipping” at checkout.
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 | |||||