129524070 Chevy/GM Gen III LS3 Competition Rotating Assembly
InfoVehicle Info Needed
EAGLEPART NUMBER: 356-129524070

129524070 Chevy/GM Gen III LS3 Competition Rotating Assembly

$2,95599
ShippingShips on 09/16/2026
Lowest PriceLowest Price Guarantee

LS Competition Rotating Assemblies
  • 4.070" Bore
  • 58 Tooth Reluctor
  • Competition Rotating Assembly
  • Chevy/GM LS3 Engine
  • 429 ci. (4.070 in. Bore x 4.125 in. Stroke)
  • Forged 4340 Crank
  • H-Beam 6.125 in. Forged Rods
  • -5.8 cc Forged Flat Tops
  • Plasma-Moly File Fit Rings
  • King XP Rod/Main Bearings
  • Unbalanced

    Eagle 129524070 Competition Rotating Assembly Includes:

    • 4.125 in. Forged 4340 Crank
    • 58 Tooth Reluctor
    • 6.125 in. H-Beam Rods
    • 7/16 in. ARP 8740 Bolts
    • Forged 4032 Mahle -5.8 cc Flat Top 4.070 in. Pistons
    • Plasma-Moly File Fit Rings
    • King XP Rod/Main Bearings

    Eagle 129524070 Competition Rotating Assembly Notes:

    • Compatible with LS3 engines w/58 tooth reluctor and bored to 4.070 in.
    • Competition rated for all forms of racing use, including nitrous and forced-induction
    • The assembly is shipped unbalanced and must be balanced by a qualified machine shop before use
    • Does not include Damper or Flywheel/Flexplate

    Eagle 129524070 Competition Rotating Assembly Specs:

    • Competition Assembly
    • Displacement: 429 ci.
    • Pistons: Mahle
    • Dome Volume: -5.8 cc
    • Piston Alloy: 4032
    • Bore Size: 4.070 in.
    • Rings: 1.0, 1.0, 2.0 mm
    • Piston Pin Height: 1.050 in.
    • Pin Size: .927 in.
    • Stroke: 4.125 in.
    • Crank Material: Forged 4340
    • Rod Length: 6.125 in.
    • Rod Design: 4340 H-Beam
    • Rod Bolts: 7/16 in. ARP 8740
    • Bearings: King XP
    • Damper Included: No
    • Flexplate or Flywheel Included: No
  • Part TypeEngine Rotating Assembly Kit
    BrandEAGLE
    Package Height16.75
    Package Width21.0
    Package Length40.25
    Weight93.0 PG
    Part CategoryPerformance Parts
    Crankshaft MaterialForged 4340 steel
    Wrist Pin StyleFloating
    Flexplate IncludedNo
    Connecting Rod Beam StyleH Beam
    Engine Make/SizeGM Gen III LS1
    Piston StyleFlat top, with two valve reliefs
    Flywheel IncludedNo
    Assembly Lubricant IncludedYes
    Gaskets IncludedNo
    Rear Main Seal Style1-piece
    Crankshaft IncludedYes
    Piston Rings IncludedYes
    Actual Engine Cid429
    Engine Stroke4.125 in
    Connecting Rod MaterialForged 4340 steel
    QuantitySold as a kit
    Connecting Rods IncludedYes
    Connecting Rod Length Center To Center6.125 in.
    Camshaft IncludedNo
    BalancedNo
    Piston MaterialForged aluminum
    Cam Bearings IncludedNo
    Part FitmentSemi Universal
    Lifters IncludedNo
    Bore4.070 in.
    Vendor Part Number129524070
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

    Items You Need

    Break-In/Engine Oil Supplement [12 oz. Bottle]

    JEGS

    Break-In/Engine Oil Supplement [12 oz. Bottle]

    Part Number : 555-28060
    $1009$11.99
    You Save$1.90
    Engine Assembly Lube [4 oz. Bottle]

    JEGS

    Engine Assembly Lube [4 oz. Bottle]

    Part Number : 555-28000
    $589$6.99
    You Save$1.10
    Wrinkle Band Ring Compressor Adjustable for 3" -5" Bore Sizes

    JEGS

    Wrinkle Band Ring Compressor Adjustable for 3" -5" Bore Sizes

    Part Number : 555-W80574
    $1599$17.99
    You Save$2.00
    Assortment Engine Brush Kit 9 Piece

    JEGS

    Assortment Engine Brush Kit 9 Piece

    Part Number : 555-80732
    $5299$58.99
    You Save$6.00
    Plastigauge Kit

    JEGS

    Plastigauge Kit

    Part Number : 555-80593
    $1499$16.99
    You Save$2.00
    Connecting Rod Guide Tools Fits Rods with 3/8"-24 Rod Bolts or Cap Screws

    JEGS

    Connecting Rod Guide Tools Fits Rods with 3/8"-24 Rod Bolts or Cap Screws

    Part Number : 555-80840
    $2609$31.99
    You Save$5.90
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning
    Your Cart

    Your shopping cart is empty!