SCAT Modern Muscle Engine Rotating Assemblies

Chrysler / Dodge / Jeep / Ram 5.7L Hemi / 6.1L SRT8 / 6.4L 392 / 6.2L Hellcat & Trackhawk

1-48506

Overview:

The SCAT Modern Muscle Engine Rotating Assemblies are precision-engineered kits designed for high-performance Chrysler, Dodge, Jeep, and Ram engines, including the 5.7L Hemi, 6.1L SRT8, 6.4L 392, and the 6.2L Hellcat & Trackhawk variants. These assemblies provide a reliable foundation for engine builds focused on durability and power, making them ideal for enthusiasts and professional builders looking to upgrade or rebuild their muscle car engines with confidence.

Each assembly is crafted to meet or exceed OEM specifications, ensuring compatibility and long-lasting performance. Whether you are restoring a classic muscle car or building a modern high-output engine, SCAT’s rotating assemblies deliver the strength and precision needed for demanding applications.

Key Features:

SCAT’s rotating assemblies combine quality materials and expert craftsmanship to enhance engine reliability and performance. Key features include:

• Engine displacement: 6.4L / 392 cubic inches, optimized for modern muscle engines
• Forged 4340 steel crankshaft for superior strength and durability
• Forged aluminum flat-top pistons with two valve reliefs and +7.00cc piston head volume for improved combustion efficiency
• Forged 4340 steel I-beam connecting rods, 6.125 inches center-to-center length
• Plasmamoly piston ring facing material for enhanced wear resistance and sealing
• Includes all essential bearings: rod bearings and main bearings at stock undersize
• Floating wrist pins for reduced friction and reliable piston articulation
• Balanced internally for smooth operation (note: assembly is not externally balanced)
• Sold as a complete kit for streamlined engine assembly

Construction & Design:

SCAT’s rotating assemblies are built with premium materials and precision manufacturing techniques. The forged 4340 steel crankshaft and connecting rods provide exceptional tensile strength and fatigue resistance, critical for high-horsepower and high-RPM applications. The pistons are crafted from forged aluminum, offering a lightweight yet durable solution that helps reduce reciprocating mass and improve throttle response.

The piston design features flat tops with two valve reliefs, optimizing combustion chamber shape and clearance for aggressive cam profiles. Plasmamoly piston rings ensure excellent sealing and longevity under extreme conditions. This assembly is engineered to maintain OEM fitment standards, facilitating a straightforward installation process.

Installation & Fitment:

This SCAT rotating assembly is designed to fit Chrysler, Dodge, Jeep, and Ram engines with 5.7L Hemi, 6.1L SRT8, 6.4L 392, and 6.2L Hellcat & Trackhawk configurations. Installation requires standard engine rebuild procedures and is compatible with stock bearing sizes, eliminating the need for custom machining or oversized components.

Note that this kit does not include harmonic balancer, flexplate, flywheel, camshaft, lifters, timing chain, gears, gaskets, oil pump, or assembly lubricant. These components must be sourced separately to complete the engine build.

What's Included:

• Forged 4340 steel crankshaft
• Forged aluminum flat-top pistons with valve reliefs
• Forged 4340 steel I-beam connecting rods
• Piston rings with plasmamoly facing
• Rod bearings (stock undersize)
• Main bearings (stock undersize)

Ideal For:

This rotating assembly is ideal for performance enthusiasts, engine builders, and professional shops aiming to build or rebuild modern muscle engines with reliable, high-quality components. It suits applications ranging from street performance to moderate track use where durability and OEM compatibility are priorities.

SCAT Crankshafts is part of the enthusiast aftermarket, offering components and accessories tailored to drivers who demand more from their vehicles. Their catalog supports everything from maintenance refreshes to performance-oriented upgrades, with a focus on quality and compatibility across popular platforms. If you’re building for the street with an eye toward track performance, SCAT Crankshafts is a solid option.