SCAT Modern Muscle Engine Rotating Assembly

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

1-48508BI

Overview:

The SCAT Modern Muscle Engine Rotating Assembly is a precision-engineered short block kit designed to upgrade or 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 balanced, durable foundation for enthusiasts and professional builders seeking reliable power gains and enhanced engine longevity.

Built to exacting standards, this assembly is ideal for those looking to replace worn internal components with high-quality forged parts that withstand the rigors of street performance, track use, or mild racing applications. It offers a direct-fit solution that maintains factory dimensions and clearances, ensuring compatibility with existing engine components and accessories.

Key Features:

This SCAT rotating assembly combines advanced materials and expert craftsmanship to deliver a robust and balanced engine foundation. Key features include:

• Engine displacement of 6.4L (392 cubic inches) with a 3.927-inch bore and 4.050-inch stroke
• Forged aluminum pistons with a dome design featuring a trough for optimized combustion
• Forged 4340 steel crankshaft and connecting rods for superior strength and durability
• Internal engine balance for smooth operation and reduced vibration
• Floating wrist pins and plasmamoly piston rings included for enhanced wear resistance
• Stock-size rod and main bearings for straightforward installation without machining
• I-beam connecting rod design for improved rigidity under high loads
• Comprehensive kit including pistons, crankshaft, rods, bearings, and rings

Construction & Design:

The assembly features a forged 4340 steel crankshaft and connecting rods, materials renowned for their exceptional tensile strength and fatigue resistance. The forged aluminum pistons are lightweight yet durable, designed with a dome and trough to optimize combustion chamber dynamics and improve power output. Each component is precision balanced internally to ensure smooth engine operation and longevity.

SCAT’s manufacturing process emphasizes tight tolerances and quality control, resulting in components that meet or exceed OEM specifications. The use of plasmamoly piston ring facing material enhances ring sealing and wear resistance, contributing to improved compression and oil control.

Installation & Fitment:

This rotating assembly is engineered as a direct replacement for most Chrysler, Dodge, Jeep, and Ram Hemi engines in the 5.7L to 6.4L range, including performance models such as the 6.1L SRT8, 6.2L Hellcat, and 6.4L 392. It fits within factory engine blocks without requiring modifications, making it suitable for rebuilds or performance upgrades.

Installation requires standard engine assembly procedures and attention to torque specifications. Note that this kit does not include camshaft, lifters, timing components, gaskets, or oil pump, so those must be sourced separately. Professional installation is recommended to ensure optimal engine performance and reliability.

What's Included:

• Forged 4340 steel crankshaft
• Forged aluminum pistons with floating wrist pins
• Forged 4340 steel I-beam connecting rods
• Piston rings with plasmamoly facing
• Rod and main bearings (stock size)

Ideal For:

This SCAT rotating assembly is perfect for engine builders, performance enthusiasts, and professional shops aiming to rebuild or upgrade Chrysler, Dodge, Jeep, and Ram Hemi engines with a reliable, high-quality rotating assembly. It suits street performance builds, mild racing applications, and any project requiring durable forged internals with factory-compatible dimensions.

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.