SCAT Modern Muscle Engine Rotating Assembly Kit

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

1-48507

Overview:

The SCAT Modern Muscle Engine Rotating Assembly Kit is engineered for enthusiasts and professional builders seeking a reliable, high-quality rotating assembly for Chrysler, Dodge, Jeep, and Ram engines. Designed to fit a range of iconic powerplants including the 5.7L Hemi, 6.1L SRT8, 6.4L 392, and the high-performance 6.2L Hellcat and Trackhawk engines, this kit provides the essential components needed to rebuild or upgrade your engine’s bottom end.

Whether you are restoring a classic muscle car or building a modern performance machine, this kit delivers durable forged components that stand up to demanding conditions. It offers a solid foundation for increased power and improved engine longevity.

Key Features:

This rotating assembly kit combines precision engineering with premium materials to ensure dependable performance 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 for optimal combustion chamber clearance
• Piston rings made from plasmamoly material for enhanced wear resistance and sealing
• Floating wrist pins for reduced friction and reliable piston articulation
• Complete set of rod and main bearings included, sized to stock specifications
• Balanced internal engine components (excluding external balancing)
• Precision bore size of 3.927 inches (99.746 mm) and stroke of 4.050 inches for a 6.4L/392 displacement
• Includes piston ring sets and rod bearings for a comprehensive rebuild solution

Construction & Design:

SCAT’s rotating assembly is crafted with meticulous attention to material quality and manufacturing processes. The crankshaft and connecting rods are forged from 4340 steel, a high-strength alloy known for its toughness and resistance to stress and fatigue. This ensures the assembly can handle high RPMs and increased power outputs typical of modern muscle engines.

The pistons are forged from lightweight aluminum alloy, featuring a dished crown with valve reliefs to maintain proper clearance and optimize combustion efficiency. The use of plasmamoly piston rings enhances durability and maintains excellent sealing under extreme conditions. The floating wrist pins reduce wear and friction, contributing to smoother engine operation and longevity.

Installation & Fitment:

This kit is designed as a direct fit for 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 rebuilding procedures and should be performed by experienced technicians or knowledgeable enthusiasts. Note that this kit does not include external components such as harmonic balancer, flexplate, flywheel, camshaft, lifters, timing chain, gears, gaskets, or oil pump, which must be sourced separately.

What's Included:

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

Ideal For:

This rotating assembly kit is ideal for engine builders, performance enthusiasts, and restorers who demand a durable, high-quality bottom-end solution for modern muscle engines. It suits applications ranging from street performance builds to track-focused projects where reliability and strength are paramount. The kit supports a variety of Chrysler-based engines, making it a versatile choice for multiple platforms.

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.