SCAT Modern Muscle Engine Rotating Assemblies

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

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Overview:

The SCAT Modern Muscle Engine Rotating Assembly is a precision-engineered kit designed to upgrade and rebuild most Chrysler, Dodge, Jeep, and Ram Hemi engines ranging from 5.7L to 6.4L, including high-performance variants like the 6.1L SRT8, 6.2L Hellcat, and 6.4L 392. This rotating assembly provides a solid foundation for enthusiasts and professional builders seeking durability and reliability in high-output applications.

Built to exacting standards, this assembly is ideal for those looking to enhance engine strength and longevity while maintaining factory dimensions and compatibility. Whether you are restoring a classic muscle car or building a modern performance engine, SCAT’s rotating assembly offers a balanced combination of quality components engineered to work seamlessly together.

Key Features:

SCAT’s rotating assembly incorporates premium materials and design elements to ensure optimal performance and durability. Key features include:

• Forged 4340 steel crankshaft for superior strength and fatigue resistance
• Forged aluminum pistons with dome design and trough for enhanced combustion efficiency
• Floating wrist pins for reduced friction and improved piston articulation
• Plasmamoly-faced piston rings for excellent wear resistance and sealing
• Forged 4340 steel I-beam connecting rods, 6.125 inches center to center
• Complete set of rod and main bearings at stock size for precise fitment
• Balanced internal engine components to maintain smooth operation (note: assembly is not externally balanced)
• Compatible with 6.4L/392 engine displacement with a bore of 3.927 inches and stroke of 4.050 inches
• Includes pistons, crankshaft, connecting rods, and bearings for a comprehensive rotating assembly

Construction & Design:

Every component in the SCAT rotating assembly is crafted from high-grade materials to withstand the rigors of high-performance use. The crankshaft and connecting rods are forged from 4340 steel, known for its exceptional tensile strength and durability under extreme loads. The pistons are forged aluminum, providing a lightweight yet robust design that helps reduce reciprocating mass and improve throttle response.

The piston design features a dome with a trough, optimizing combustion chamber shape for efficient power delivery. Piston rings are faced with plasmamoly, a material that enhances ring life and maintains a tight seal under high temperatures and pressures. This assembly is engineered to fit directly into compatible Chrysler and Dodge Hemi engines without requiring modifications, ensuring a straightforward installation process.

Installation & Fitment:

This rotating assembly is designed to fit a wide range of Chrysler, Dodge, Jeep, and Ram Hemi engines, including 5.7L, 6.1L SRT8, 6.2L Hellcat, and 6.4L 392 variants. It is a direct replacement for factory rotating assemblies, allowing for a smooth upgrade or rebuild without the need for custom machining or alterations.

Installation should be performed by a qualified engine builder or technician to ensure proper clearances and torque specifications are met. Note that this kit does not include camshaft, lifters, timing components, or gaskets, so those items must be sourced separately to complete the engine build.

What's Included:

• Forged 4340 steel crankshaft
• Forged aluminum pistons with dome and trough design
• Forged 4340 steel I-beam connecting rods (6.125" center to center)
• Floating wrist pins
• Piston rings with plasmamoly facing
• Rod bearings (stock size)
• Main bearings (stock size)

Ideal For:

This SCAT rotating assembly is perfect for engine builders, performance enthusiasts, and restorers working on Chrysler, Dodge, Jeep, or Ram vehicles equipped with Hemi engines from 5.7L to 6.4L. It suits applications ranging from street performance upgrades to serious muscle car builds where reliability and strength are paramount. The kit is especially beneficial for those seeking a forged rotating assembly that maintains factory dimensions and fitment.

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.