Product Summary

350 mains Main Journal Style, 3.480" Engine Stroke

  • Fits 350 Chevy small block V8
  • 3.480" stroke
  • Kit includes crankshaft, claimer pistons, and I-beam connecting rods
  • Two piece rear main seal
  • 6" rod length

Comes as a Kit

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Key Specs

MFG. Part #91510212
BrandSpeedway Motors
Connecting Rod TypeI-Beam
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91510212 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.

NOTE: These rotating assemblies may require additional charges for heavy metal.

Item Details

Flat top, 2 valve relief
Ring style: A

C/R 58cc=11.2, 64cc=10.4, 76cc=9.1
Piston/Pin Weight: 541 g
Rod Length: 6.0"     

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

Speedway Motors 91510212 Specifications

KEY SPECS
MFG. Part #91510212
BrandSpeedway Motors
Connecting Rod TypeI-Beam
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum
GENERAL
Main Journal Style350 mains
Engine Stroke3.480"
Connecting Rod Length6.000"
Connecting Rod MaterialForged 5140 Steel
Connecting Rod Weight585 grams
Connecting Rod Bolt Diameter3/8"
Piston Weight439 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

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Awesome rotating assembly

5.0

10 years ago

Jim

Phoenix, AZ

Verified

I bought this rotating assembly for my street stock and couldn't be happier. The rotating assembly was extremely easy to install and has worked well ever since. I'm extremely happy with this kit and will purchase another when the time comes.

Would Recommend

Showing 1 of 1 reviews

Questions & Answers

10 Questions • 10 Answers

Does the block require any machining to clear the 6" rod?

by Cb

• 7 years ago

1 answer

What is the estimated max power this assembly can handle?

by Trevor

• 7 years ago

1 answer

what rod bolt are used

by pete

• 7 years ago

1 answer

Does this kit come with bearings?

by Reggie

• 8 years ago

1 answer

Can I substitute 30 over Pistons for a 355 in this kit?

by Jacob

• 8 years ago

1 answer

What is the estimated compression ratio for 64cc cylinder heads?

by Richard Weiser

• 9 years ago

1 answer

Can you order this kit with 6in rods rather than 5.7 rods if so how much extra would it cost if any?

by Big D

• 10 years ago

1 answer

will i need to do block grinding useing 6in. rods sbc?

by grandpa or fig

• 11 years ago

1 answer

Can a scat 9000 be used with this and forged rods.

by Lelan

• 11 years ago

1 answer

Can this kit be ordered with bushed rods 91015398

by Mauler

• 11 years ago

1 answer

10 of 10 questions shown

Fitment

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  • Gen 1 L82 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L48 Small Block Chevy

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  • Gen 1 L81 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • 2-Piece Rear Main Chevy 350

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  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

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  • 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

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L48 Small Block Chevy

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  • Gen 1 L48 Small Block Chevy

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  • Gen 1 L48 Small Block Chevy

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  • 2-Piece Rear Main Chevy 350

  • Gen 1 L48 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

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  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • 2-Piece Rear Main Chevy 350

  • 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 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • 2-Piece Rear Main Chevy 350

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

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  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

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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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • Gen 1 L46 Small Block Chevy

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  • Gen 1 L65 Small Block Chevy

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  • Gen 1 LM1 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • 350 Chevy Small Block V8

  • 350 Chevy Small Block V8

  • 350 Chevy Small Block V8

  • 350 Chevy Small Block V8

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