DSS Racing FX Series Forged Piston Set 3.917" Bore: Fits Chrysler / Dodge / Jeep / Ram 5.7L Hemi

DSS Racing FX Series Forged Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models

1-6723-3917 / 2-6723-3917 / 3-6723-3917 / K1-6723-3917 / K2-6723-3917 / K3-6723-3917

Overview:

The DSS Racing FX Series Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the 345 Small Block Mopar Hemi Gen III. Designed for enthusiasts and professional builders seeking enhanced durability and performance, these pistons offer a reliable upgrade over stock components. Their forged construction ensures superior strength to withstand high combustion pressures and aggressive driving conditions, making them ideal for street performance, mild racing, and engine rebuilds.

With a bore size of 3.917 inches and a compression height of 1.21 inches, these pistons are precision-crafted to maintain optimal engine geometry and performance. The -12cc dish top design helps control compression ratios, allowing for tuning flexibility across various engine builds.

Key Features:

These DSS Racing forged pistons incorporate advanced design and manufacturing techniques to deliver consistent performance and longevity. Key features include:

• Forged construction for maximum strength and durability under high stress
• 3.917" bore size, compatible with most Chrysler / Dodge / Jeep / Ram 5.7L Hemi engines
• 12cc dish top to optimize combustion chamber volume and compression ratio
• 1.21" compression height for precise piston-to-cylinder head clearance
• .945" wrist pin diameter with options for full-floating or press-fit configurations
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm for reliable ring sealing and reduced blow-by
• Designed to fit 3.578" stroke crankshafts and 6.243" connecting rods
• Available in multiple dish volumes (65cc, 74cc, 85cc) to support compression ratios from approximately 7.74:1 to 9.33:1

Construction & Design:

The FX Series pistons are forged from high-grade aluminum alloy, providing an excellent balance of lightweight design and structural integrity. The forging process refines the metal grain structure, resulting in pistons that resist cracking and deformation under extreme thermal and mechanical loads. The dish top design helps reduce detonation risk by controlling compression, while the precise ring grooves ensure optimal ring fitment and longevity.

Each piston is machined to tight tolerances to maintain consistent fitment and performance. The wrist pin options allow builders to select either full-floating or press-fit pins depending on their application and preference, enhancing versatility for different engine builds.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, including the 345 Small Block Mopar Hemi Gen III platform. Installation requires standard engine rebuilding procedures, including proper honing of cylinder bores and careful measurement of piston-to-wall clearance. The pistons are compatible with 3.578" stroke crankshafts and 6.243" connecting rods, ensuring a direct fit for common 5.7L Hemi configurations.

Builders should verify compression ratio requirements and select the appropriate dish volume piston to match their specific engine setup and fuel requirements. Professional installation is recommended to ensure optimal engine performance and reliability.

What's Included:

• Set of forged pistons (quantity as required for engine)
• Wrist pins (.945" diameter) with options for full-floating or press-fit installation
• Precision-machined piston rings with 1.2/1.2/3mm groove dimensions
• Installation instructions and technical specifications

Ideal For:

This DSS Racing FX Series Forged Piston Set is ideal for automotive enthusiasts, engine builders, and performance shops upgrading or rebuilding Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines. Whether you are enhancing a street performance build, preparing for mild racing, or seeking a durable replacement for a high-mileage engine, these pistons provide the strength and reliability needed to handle increased power and stress.