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SP104 Elite Series GM Gen V LT 416 ci. Short Block w/Forged Crank, H-Beam Rods, +10 cc Dished Forged Pistons
InfoVehicle Info Needed
ATK ENGINESPART NUMBER: 059-SP104

SP104 Elite Series GM Gen V LT 416 ci. Short Block w/Forged Crank, H-Beam Rods, +10 cc Dished Forged Pistons

$7,38752
Truck Freight
ShippingShips on 11/17/2026
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416 ci.
Elite Series GM Gen V LT Short Block
  • 416 ci. Displacement
  • GM LT1, LT4 Aluminum Block (4.065 in. Bore)
  • Forged 4340 Steel Crank (4 in. Stroke)
  • Forged 4340 H-Beam Rods
  • Forged 2618 Dished +10 cc Pistons
  • Steel Top Rings w/Napier 2nd Ring Set

    ATK Engines SP104 Elite Series GM Gen V LT Short Block Features:

    • New GM Gen V LT1/LT4 Aluminum Block
    • Built for Naturally Aspirated, Boosted, or Nitrous Engines
    • Installed Factory Piston Squirters

    ATK Engines SP104 Elite Series GM Gen V LT Short Block Specs:

    • Bore: 4.065 in.
    • Stroke: 4 in.
    • Displacement: 416 ci.
    • Crankshaft: Manley 4340 Forged w/58 Tooth Reluctor Wheel
    • Rods: Manley 4340 forged H-beam 6.125 in. w/ARP 2000 bolts
    • Pistons: 2618 Forged +10 cc Dished
    • Rings: Total Seal CS AP Steel Top Ring with Napier 2nd Ring Set
    • Camshaft Bearings: Installed & Positioned to OEM Position
    • Freeze Plugs: Installed with Sealant
    • Oil Galley Plugs: Installed with Sealant

    ATK Engines SP104 Recommended Components (Each Sold Separately):

    • Balancer Internally balanced such as TCI 918856 or equivalent
    • Flexplate Internally balanced such as TCI 399860 or equivalent
    • Head Gasket .051 in. Compressed Thickness such as Cometic C15203-051 or equivalent
    • OEM-Style Oil Pump such as AC Delco 12686434 or equivalent
    • 5W30 NON-SYNTHETIC oil for first 3000 miles

    Please CLICK HERE for ATK Warranty

      • LT Short Blocks Built for Power

      ATK Engines Elite Series GM Gen V LT Short Blocks are available with either dome or dished pistons, making them the perfect choice for naturally aspirated, turbos, superchargers, or nitrous builds.

    Part TypeEngine Short Block
    Product LineATK Engines Elite Series GM Gen V LT Short Blocks
    BrandATK ENGINES
    Package Height36.0
    Package Width36.0
    Package Length36.0
    Weight445.0 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part NumberSP104
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning