BC383J030 Main Bearing Set for 1959-1979 Buick, Pontiac 5.3L, 5.7L, 6.4L, 6.6L [+0.030 in. Oversize]
InfoVehicle Info Needed
ENGINETECHPART NUMBER: 416-BC383J030

BC383J030 Main Bearing Set for 1959-1979 Buick, Pontiac 5.3L, 5.7L, 6.4L, 6.6L [+0.030 in. Oversize]

$8199
ShippingShips on 11/09/2026
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GM
Main Bearing Set
  • 1959-1979 Buick, Pontiac 5.3L, 5.7L, 6.4L, 6.6L
  • Size: +0.030 in. Oversize
  • Standard Bi-metal Construction
  • Sold as a Set

    The Enginetech BC383J030 is a main bearing set for GM/Pontiac, 5.3L 326, 5.7L 350, 6.4L 389, 6.6L 400 engines at +0.030 in. Oversize. Engineered to maintain proper crankshaft clearance and oil film.

    Enginetech BC383J030 Main Bearing Set Features:

    • Fitment: GM/Pontiac, 5.3L 326, 5.7L 350, 6.4L 389, 6.6L 400
    • Size: +0.030 in. Oversize
    • Engineered to OE specifications for direct replacement
    • Precision Bearing Support for Smooth, Reliable Engine Operation

      Enginetech Main Bearings are engineered to provide stable crankshaft support and consistent rotation, helping maintain proper oil clearance and long-term engine durability. Backed by Enginetech’s reputation as a trusted supplier to professional engine builders, these bearings are manufactured using advanced materials such as aluminum-silicon alloys and traditional copper-based designs to balance load capacity, wear resistance, and anti-friction performance. Designed with precision machining and optimized crush characteristics, they help ensure proper seating, heat transfer, and resistance to bearing rotation under demanding conditions. Available in standard and multiple undersizes for rebuild applications, Enginetech main bearings provide reliable fitment, improved durability, and consistent performance for a wide range of domestic and import engines.

    Part TypeMain Bearing
    Product LineEnginetech Main Bearings
    BrandENGINETECH
    Package Height2.5
    Package Width3.5
    Package Length7.0
    Weight1.5 PG
    Part CategoryReplacement Parts
    ConstructionStandard bi-metal
    Size+0.030 in. Oversize
    QuantitySold as a set
    FitmentGM/Pontiac
    Part FitmentDirect Fit
    Engine Displacement6.6L 400
    Vendor Part NumberBC383J030
    Package Qty1
    Package TypeEA

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