SCAT Modern Muscle Engine Rotating Assembly Kit

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

1-48507BI

Overview:

The SCAT Modern Muscle Engine Rotating Assembly Kit is engineered for enthusiasts and professional builders seeking a reliable, high-performance rotating assembly for Chrysler, Dodge, Jeep, and Ram engines. Designed to fit 5.7L Hemi, 6.1L SRT8, 6.2L Hellcat, and 6.4L 392 engine platforms, this kit provides a balanced, forged rotating assembly that enhances engine durability and performance. It is ideal for engine rebuilds, upgrades, or custom builds where strength and precision are paramount.

With SCAT’s reputation for quality and precision, this kit offers a comprehensive solution that ensures smooth operation and long-lasting reliability under demanding conditions. Whether you’re building a street machine, a muscle car, or a high-performance truck, this assembly delivers the foundation needed for serious power and engine longevity.

Key Features:

This rotating assembly kit combines premium materials and expert engineering to deliver superior performance and durability. Key features include:

• Balanced rotating assembly for smooth engine operation and reduced vibration
• Forged 4340 steel crankshaft for exceptional strength and fatigue resistance
• Forged aluminum pistons with a dished design and two valve reliefs for optimal combustion chamber clearance
• Forged 4340 steel I-beam connecting rods with 6.125-inch center-to-center length for durability and precise fitment
• Plasmamoly piston rings included for enhanced wear resistance and sealing
• Stock size rod and main bearings included for straightforward installation
• Floating wrist pins for reduced friction and reliable piston articulation
• Engine displacement optimized at 6.4L/392 cubic inches with a bore of 3.927 inches and stroke of 4.050 inches

Construction & Design:

SCAT’s rotating assembly is built with premium forged components to withstand the rigors of high-performance applications. The crankshaft is crafted from forged 4340 steel, known for its superior strength and toughness, ensuring it can handle increased horsepower and torque demands. The connecting rods are also forged 4340 steel with an I-beam design, providing an excellent balance of strength and weight savings.

The pistons are forged aluminum with a dished top and two valve reliefs, allowing for proper valve clearance and efficient combustion. The use of plasmamoly piston rings enhances durability and maintains optimal sealing under high-stress conditions. This kit is internally balanced, which contributes to smoother engine operation and longevity.

Installation & Fitment:

This rotating assembly kit is designed as a direct fit for Chrysler, Dodge, Jeep, and Ram engines with 5.7L Hemi, 6.1L SRT8, 6.2L Hellcat, and 6.4L 392 displacements. Installation requires standard engine rebuilding procedures, and the kit includes all critical rotating components except for the harmonic balancer, flexplate, flywheel, camshaft, lifters, timing chain and gears, gaskets, oil pump, plastigage, and assembly lubricant, which must be sourced separately.

Professional installation is recommended to ensure proper clearances and torque specifications are met. This kit is ideal for engine builders upgrading or restoring modern muscle engines to handle increased power and performance demands.

What's Included:

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

Ideal For:

This SCAT rotating assembly kit is perfect for engine builders, performance enthusiasts, and professional shops working on Chrysler, Dodge, Jeep, and Ram modern muscle engines. It suits those rebuilding or upgrading 5.7L Hemi, 6.1L SRT8, 6.2L Hellcat, or 6.4L 392 engines who demand durability, precision balance, and forged strength to support high horsepower and torque applications.

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.