SCAT Modern Muscle Engine Rotating Assemblies

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

1-48504

Overview:

The SCAT Modern Muscle Engine Rotating Assembly is a precision-engineered rotating kit designed to fit a wide range of Chrysler, Dodge, Jeep, and Ram vehicles equipped with 5.7L to 6.4L Hemi engines, including high-performance variants like the 6.1L SRT8, 6.2L Hellcat, and 6.4L 392. This assembly is ideal for enthusiasts and engine builders seeking a reliable, durable foundation for building or rebuilding powerful Hemi engines.

Built to exacting standards, this rotating assembly provides the core components necessary for a balanced and robust bottom end, ensuring smooth operation and longevity under demanding conditions. Whether you are restoring a classic muscle car or upgrading a modern performance vehicle, this SCAT kit delivers quality and consistency.

Key Features:

This SCAT rotating assembly offers a comprehensive set of components engineered for strength and durability:

• Forged 4340 steel crankshaft for superior strength and fatigue resistance
• Forged 4340 steel I-beam connecting rods, 6.125 inches center-to-center length
• Forged aluminum pistons with a dished design and two valve reliefs, featuring a +17.00cc piston head volume
• Floating wrist pins for reduced friction and enhanced durability
• Plasmamoly piston rings included for improved sealing and wear resistance
• Balanced internal engine components (note: assembly is not externally balanced)
• Stock size rod and main bearings included for precise fitment
• Compatible with 1-piece rear main seal style
• Engine displacement of 6.2L (378 cubic inches) with a bore of 3.927 inches (99.746mm) and stroke of 3.900 inches

Construction & Design:

SCAT’s rotating assembly is crafted using premium forged materials to withstand the rigors of high-performance applications. The crankshaft and connecting rods are made from forged 4340 steel, a material known for its exceptional tensile strength and toughness, ensuring reliable operation under high stress and RPM conditions.

The pistons are forged from high-quality aluminum alloy, offering a lightweight yet durable solution that helps reduce reciprocating mass and improve engine responsiveness. The dished piston design with valve reliefs allows for optimal combustion chamber clearance, supporting high compression ratios and aggressive cam profiles.

Each component is manufactured to tight tolerances and assembled with precision to maintain engine balance and durability, making this kit a dependable choice for engine builders focused on performance and longevity.

Installation & Fitment:

This rotating assembly is designed for direct fitment in most Chrysler, Dodge, Jeep, and Ram vehicles equipped with 5.7L Hemi, 6.1L SRT8, 6.4L 392, and 6.2L Hellcat & Trackhawk engines. Installation requires standard engine assembly procedures and should be performed by experienced technicians or engine builders to ensure proper clearances and torque specifications.

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

What's Included:

• Forged 4340 steel crankshaft
• Forged 4340 steel I-beam connecting rods (6.125" center-to-center)
• Forged aluminum pistons with two valve reliefs
• Floating wrist pins
• Plasmamoly piston rings
• Rod bearings (stock size)
• Main bearings (stock size)

Ideal For:

This SCAT rotating assembly is perfect for engine builders, performance enthusiasts, and professional rebuilders who demand a high-quality, durable rotating assembly for modern muscle Hemi engines. It is well-suited for street performance builds, mild to moderate racing applications, and reliable daily drivers requiring a strong bottom end foundation.

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.