SCAT Modern Muscle Engine Rotating Assembly Kit

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

1-48506BI

Overview:

The SCAT Modern Muscle Engine Rotating Assembly Kit is a precision-engineered solution designed for high-performance Chrysler, Dodge, Jeep, and Ram engines, including the 5.7L Hemi, 6.1L SRT8, 6.4L 392, and 6.2L Hellcat & Trackhawk variants. This comprehensive rotating assembly kit is ideal for engine builders and enthusiasts seeking a reliable, balanced, and durable foundation for their build or rebuild projects.

Crafted to exacting standards, this kit enhances engine durability and performance by utilizing forged components and balanced assemblies. It is perfect for those looking to maintain factory-like reliability while upgrading internal components for increased strength and longevity.

Key Features:

Engineered for strength and precision, the SCAT Modern Muscle Kit includes a range of high-quality components designed to work seamlessly together:

• Forged 4340 steel crankshaft for superior strength and durability
• Forged 4340 steel I-beam connecting rods, 6.125 inches center-to-center length
• Forged aluminum flat-top pistons with two valve reliefs and +7.00cc piston head volume
• Plasmamoly-faced piston rings for enhanced wear resistance and sealing
• Balanced internal engine assembly for smooth operation and reduced vibration
• Floating wrist pins for reliable piston articulation
• Stock size rod and main bearings included for precise fitment
• Compatible with 6.4L/392 engine displacement with a bore of 3.927 inches (99.746mm) and a stroke of 4.050 inches

Construction & Design:

SCAT’s rotating assembly kit is built with premium materials to withstand the rigors of modern muscle engines. The crankshaft and connecting rods are forged from 4340 steel, known for its exceptional tensile strength and fatigue resistance, ensuring long-lasting durability under high-stress conditions. The pistons are crafted from forged aluminum, offering a lightweight yet strong design that improves engine response and efficiency.

The flat-top piston design with dual valve reliefs optimizes combustion chamber volume and clearance, supporting high compression and aggressive cam profiles. The plasmamoly piston rings provide excellent sealing and wear resistance, contributing to improved oil control and reduced blow-by.

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 assembly procedures and should be performed by experienced professionals or knowledgeable enthusiasts. Note that this kit does not include camshaft, harmonic balancer, flexplate, flywheel, gaskets, oil pump, lifters, timing chain, or gears, 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 flat-top pistons with two valve reliefs
• Floating wrist pins
• Plasmamoly piston rings
• Rod bearings (stock size)
• Main bearings (stock size)

Ideal For:

This rotating assembly kit is ideal for engine builders, performance enthusiasts, and professional shops looking to rebuild or upgrade modern muscle engines with a focus on durability and balanced performance. It suits applications ranging from street performance to moderate track use where reliability and strength are paramount.

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.