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Product Summary

350, 383, 350 mains Main Journal Style

  • Fits 350/383 Chevy Small Block V8
  • Kit includes 2-pc rear main seal cast steel crank, rods and pistons
  • Forged 5140 Steel connecting rods
  • Flat Top w/ 2 valve reliefs piston style made from hypereutectic aluminum
  • Cast steel crankshaft

Comes as a Kit

Key Specs

MFG. Part #91510217
BrandSpeedway Motors
Connecting Rod TypeI-Beam
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum

Need To Know

This Product Will Ship Free

Quick and Easy Returns

Details

Speedway introduces rotating assembly engine rebuild kits, with an optional balance job. Includes 2-pc rear main seal cast steel crank, rods and pistons. Cranks are new so they use standard size bearings.

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.

NOTE: Piston rings are not included and must be purchased separately.

Item Details

Flat top, 2 valve relief
Ring style: C

C/R 58cc=11.2, 64cc=10.1, 76cc=9.8
Piston/Pin Weight: 527 g
Rod Length: 6", Ring Style: C     

Kits include:

  • Speedway Cast Steel Crankshaft
    • Two-piece rear main
    • 80-60-06 cast steel construction
    • Fatigue-resistant with near forged steel endurance
    • Standard size journals
  • Speedway 5140 I-Beam Claimer Connecting Rods
    • 5140 heat treated steel
    • Shot peened and magnafluxed
    • 6.0 " length
    • Press pin
    • 585 grams
  • KB Signature Series Hypereutectic Claimer Pistons
    • Coated skirts
    • Wrist pin lock rings
    • T-5 hypereutectic construction
    • Can be used with press fit or floating wrist pins

Kits include:

  • Speedway Cast Steel Crankshaft
    • Two-piece rear main
    • 80-60-06 cast steel construction
    • Fatigue-resistant with near forged steel endurance
    • Standard size journals
  • Speedway 5140 I-Beam Claimer Connecting Rods
    • 5140 heat treated steel
    • Shot peened and magnafluxed
    • 6.0 " length
    • Press pin
    • 585 grams
  • KB Signature Series Hypereutectic Claimer Pistons
    • Coated skirts
    • Wrist pin lock rings
    • T-5 hypereutectic construction
    • Can be used with press fit or floating wrist pins

Specifications

KEY SPECS
MFG. Part #91510217
BrandSpeedway Motors
Connecting Rod TypeI-Beam
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum
GENERAL
Main Journal Style350 mains
Engine Stroke3.750"
Connecting Rod Length6.000"
Connecting Rod MaterialForged 5140 Steel
Connecting Rod Weight585 grams
Connecting Rod Bolt Diameter3/8"
Piston Weight425 grams
Piston Ring StyleC
Crankshaft MaterialCast Steel
Rear Main Seal Style2-piece
Wrist Pin Diameter.9272"
Wrist Pin Weight102 grams
Main Journal Diameter2.448"
Rod Journal Diameter2.10"
Bearing ConstructionBi-metal
Bearing UndersizeStandard
Narrowed BearingYes
Coated BearingNo
Sold in QuantityKit