Product Summary

350, 383, 3.750" Engine Stroke, Dish Piston Style

    Comes as a Kit

    Key Specs

    MFG. Part #91510242
    BrandSpeedway Motors
    Connecting Rod TypeI-Beam
    Piston StyleDish
    Piston MaterialHypereutectic Aluminum

    Need To Know

    This Product Will Ship Free

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    Return Policy

    Speedway Motors 91510242 Details

    These rotating assembly engine rebuild kits are designed for street use and include Keith Black Hypereutectic pistons, Speedway 5140 I-beam rods, main/rod bearings and a Speedway Cast Steel crankshaft. Rings not included. Journals are standard size.

    Due to larger journal side radius on this aftermarket crankshaft, you must use Clevite H-series, King bearings (included in kit) or equivalent.

    These assemblies will require balancing either by us or your machine shop.

    All balancing is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience!  A kit purchased with the optional balance job will ship in 24-48 hours.

    Specs

    Kit features:

    • Speedway Cast Steel Crankshaft
      • Two-piece rear main
      • 80-60-06 cast steel
    • Speedway 5140 I-Beam Connecting Rods
      • Heat treated, shot peened and magnafluxed
      • 5.7" length
      • Set of 8 rods
      • Bushed pin
      • 658 grams
    • KB Hypereutectic Dished Pistons
      • T-5 heat treated aluminum construction 
      • 4.000" bore pistons available in .030, .040, or .060 sizes
      • 4.125" bore pistons available in .030 or .040 sizes

    Speedway Motors 91510242 Specifications

    KEY SPECS
    MFG. Part #91510242
    BrandSpeedway Motors
    Connecting Rod TypeI-Beam
    Piston StyleDish
    Piston MaterialHypereutectic Aluminum
    GENERAL
    Engine Stroke3.750"
    Connecting Rod Length5.700"
    Connecting Rod MaterialForged 5140 Steel
    Connecting Rod Weight588 grams
    Connecting Rod Bolt Diameter3/8"
    Piston Weight500 grams
    Piston Ring StyleA
    Crankshaft MaterialCast Steel
    Rear Main Seal Style2-piece
    Wrist Pin Diameter.9272"
    Wrist Pin Weight145 grams
    Main Journal Diameter2.448"
    Rod Journal Diameter2.10"
    Bearing ConstructionBi-metal
    Bearing UndersizeStandard
    Narrowed BearingYes
    Coated BearingNo
    Sold in QuantityKit

    Ratings & Reviews

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