Product Summary

350 mains Main Journal Style, 3.480" Engine Stroke

  • Crankshaft is specifically deigned for the two-piece rear main
  • Connecting rods are manufactured from 5140 heat treated steel for added durability
  • Overall length of the connecting rods is 5.7" and weigh a total of 646 grams
  • Pistons have coated skirts and wrist pin lock rings

Comes as a Kit

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Key Specs

MFG. Part #91510208
BrandSpeedway Motors
Connecting Rod TypeI-Beam
Piston StyleDome
Piston MaterialHypereutectic Aluminum
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91510208 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

0.150" solid dome
Ring style: A

C/R 58cc=12.7, 64cc=11.6, 76cc=10.1
Piston/Pin Weight: 762 g
Rod Length: 5.7"     

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
    • 5.7 " length
    • Press pin
    • 646 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
    • 5.7 " length
    • Press pin
    • 646 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

Speedway Motors 91510208 Specifications

KEY SPECS
MFG. Part #91510208
BrandSpeedway Motors
Connecting Rod TypeI-Beam
Piston StyleDome
Piston MaterialHypereutectic Aluminum
GENERAL
Main Journal Style350 mains
Engine Stroke3.480"
Connecting Rod Length5.700"
Connecting Rod MaterialForged 5140 Steel
Connecting Rod Weight646 grams
Connecting Rod Bolt Diameter3/8"
Dome Height0.150"
Piston Weight660 grams
Piston Ring StyleA
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

Ratings & Reviews

5

2 Reviews

Overall Assessment

Customers praise our products for their top-of-the-line quality and inclusion of clear instructions. While the fast shipping is appreciated, it's the superior product quality that sets us apart. Some customers wished for better pistons, but overall, our product offers practicality and excellent usability. The competitive pricing for such high-quality materials further impresses customers, standing out compared to other brands. These aspects substantiate our product as a highly recommended choice for consumers.

5

2 reviews

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Great Parts and Fast Shipping

5.0

8 years ago

Mjordanlmj

Pasadena Texas

Verified

Quick delivery and packed very good. Products are top of the line and instructions were included. Way to go Speedway. Thank you.

Would Recommend

Great price with top shelf parts

5.0

8 years ago

LMJ

Pasadena, Texas

Verified

just wish it had better pistons

Showing 2 of 2 reviews

Questions & Answers

5 Questions • 5 Answers

internal or external balance

by royboy

• 4 years ago

1 answer

What is the bore size of the piston?

by J

• 6 years ago

1 answer

Are these kits balanced?

by Mike

• 7 years ago

1 answer

What rod bolts dose this kit come with?

by Kyle

• 8 years ago

1 answer

What is the expected compression??

by dhall

• 10 years ago

1 answer

5 of 5 questions shown

Fitment

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  • Gen 1 L46 Small Block Chevy

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  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

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  • 350 Chevy Small Block V8

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