1-43708BI Street Rotating Assembly Kit [GM LS Series 408 ci]
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SCATPART NUMBER: 942-1-43708BI

1-43708BI Street Rotating Assembly Kit [GM LS Series 408 ci]

$1,93199
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58 tooth Reluctor
Rotating Assembly Street Kit
  • GM LS Series 408 ci
  • 58-Tooth Reluctor
  • 4.030 in. Bore Icon Forged Flat Top Pistons
  • 4.000 in. Stroke Forged Crankshaft
  • 6.125 in. Length Forged I-Beam Rods
  • Rated for 750 HP
  • Balanced

    Crankshaft

    • 4340 forged street crank
    • Shot peened, heat treated, precision ground, ion-nitrided
    • Throws lightened
    • Lightening holes in all rod journals
    • Large radius on all journals
    • Gun drilled mains
    • Straight shot and chamfered oil holes

    Connecting Rods

    • Pro Series 4340 forged I-beam
    • Bushed wrist pin
    • 7/16 in. ARP 8740 cap screws

    Pistons

    • Icon FHR
    • 4032 forged aluminum
    • Flat top -4 cc volume
    • Compression ratio: 64.5 cc - 11.9 ; 70 cc - 11.2
    • Coated

    Bearings

    • Clevite H-Series Rod and Main bearings
    • High-Quality Engine Packages for the Street!

      Build a stronger, more capable LS engine with Scat GM LS Series Street Rotating Assemblies, available at JEGS. Designed for performance enthusiasts who want a reliable foundation for increased horsepower and torque, these rotating assemblies deliver precision-balanced components engineered for street and strip applications. Manufactured by Scat Enterprises, the Scat GM LS Series Street Rotating Assemblies are built to handle the demands of modern LS engine builds while maintaining durability and long-term performance. Whether you’re upgrading a stock LS or building a stroker setup, these assemblies provide the strength and consistency needed for serious results.

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      Performance Benefits & Key Features

      Scat rotating assemblies are engineered to optimize bottom-end strength and engine efficiency. Each kit typically includes a crankshaft, connecting rods, pistons, rings, and bearings—matched and balanced to work together seamlessly. Designed for GM LS engines, these assemblies support improved torque output, smoother operation, and increased reliability at higher RPM ranges.

      Key specifications include forged or cast steel crankshafts for enhanced durability, precision-machined connecting rods for load-bearing strength, and performance pistons designed to maximize compression and combustion efficiency. Many configurations are available in stroker combinations, allowing builders to increase displacement and unlock additional horsepower potential. These assemblies are built with tight tolerances and high-quality finishes, ensuring proper clearances and long-lasting performance under demanding conditions.

      For enthusiasts, the result is a more responsive engine with improved throttle input, stronger acceleration, and the ability to handle higher power levels. Whether naturally aspirated or boosted, a properly matched rotating assembly is critical to achieving consistent and reliable performance.

      Fitment, Compatibility & Applications

      Scat GM LS Series Street Rotating Assemblies are specifically designed for compatibility with a wide range of GM LS-based engines, including popular platforms such as LS1, LS2, LS3, and LS6. This makes them a versatile choice for a variety of builds, from classic muscle car swaps to modern performance upgrades.

      Ideal for street performance, drag racing, and street/strip applications, these assemblies are commonly used in Camaros, Corvettes, GTOs, trucks, and custom LS-swapped vehicles. Their compatibility with factory and aftermarket components ensures a straightforward integration into both new builds and engine rebuilds. Builders can tailor their setup based on displacement goals, compression ratios, and intended use.

      Whether you’re constructing a daily driver with added performance or a high-horsepower weekend machine, these rotating assemblies provide the flexibility and strength needed to support your build. They are also a popular choice for LS swap projects, where reliability and performance are equally important.

      Backed by Scat’s reputation for precision engineering and performance-driven design, these rotating assemblies offer a dependable solution for LS engine builds. Explore the available options at JEGS to find the right configuration and take your LS performance to the next level.

    Part TypeEngine Rotating Assembly Kit
    Product LineScat GM LS Series Street Rotating Assemblies
    BrandSCAT
    Package Height14.0
    Package Width19.0
    Package Length26.0
    Weight90.0 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part Number1-43708BI
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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    Some parts are not legal for use in California or other states with similar laws / regulations
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