Customer Appreciation Week 2026

Speedway 400 Chevy Crankshaft, Two-Piece Main

Customer Appreciation Week 2026

Speedway 400 Chevy Crankshaft, Two-Piece Main
Speedway Motors

|

#91515400

Speedway 400 Chevy Crankshaft, Two-Piece Main

  • Features a new hi-tech fatigue resistant 80-60-06 cast steel construction for improved durability and long-lasting performance
  • Designed with near forged steel endurance, making it ideal for high-performance applications and heavy-duty use
  • All journals are ground and polished to exacting tolerances, ensuring precise fit and operation
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Type:

400

350383

$215.99

/each

In Stock

$239.99

Save $24.00


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Product Summary

3.750" Stroke, 400 mains Main Journal Style

  • Features a new hi-tech fatigue resistant 80-60-06 cast steel construction for improved durability and long-lasting performance
  • Designed with near forged steel endurance, making it ideal for high-performance applications and heavy-duty use
  • All journals are ground and polished to exacting tolerances, ensuring precise fit and operation
  • Offers superior quality as a stock replacement crank at a value price, making it an ideal choice for budget-conscious engine builders
  • Specifically designed for blocks with 2-piece rear main seals and external balance. It is important to note that this crank is cut for a 5.7 rod and will NOT fit stock 5.565 rod
See more details

Key Specs

Stroke3.750"
Main Journal Style400 mains
Crankshaft MaterialCast Steel
Main Journal Diameter2.648"
Rod Journal Diameter2.100"
See more specs

Need To Know

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855.313.9176
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Speedway Motors 91515400 Details

New, hi-tech fatigue resistant 80-60-06 cast steel crank with near forged steel endurance. All journals are ground and polished to exacting tolerances. Superior quality stock replacement crank at a value price.

For blocks with 2-piece rear main seals. External balance.

Item Details

NOTE: Cut for a 5.7 rod and will NOT fit stock 5.565 rod.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.
CA Prop 65
CARB warning

Speedway Motors 91515400 Specifications

KEY SPECS
MFG. Part #91515400
BrandSpeedway Motors
Stroke3.750"
Main Journal Style400 mains
Crankshaft MaterialCast Steel
Main Journal Diameter2.648"
Rod Journal Diameter2.100"
Rear Main Seal Style2-piece
GENERAL
Connecting Rod Length5.700"
Sold in QuantityEach

Ratings & Reviews

5

9 Reviews

Overall Assessment

Customers have expressed their satisfaction with the product, praising its quality and reliability. Users who have installed the product in their vehicles have noted consistent, solid performance, even under demanding conditions. The product has shown superior usability compared to alternatives, specifically old crankshafts, due to its precise dimensions. It's not just a practical solution for engine rebuilding, but a smart investment according to users. Multiple buyers intend to purchase again, underlining their trust in the product's longevity and value, which surpasses that of similar items from competitors. This highlights the product's standing as a superior choice.

Write A Review

5

9 reviews

5

9

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I would buy the product again and again

5.0

4 months ago

Rc

La, ca.

Verified

The price is the best

Would Recommend

I would buy agin if need

5.0

a year ago

Anthony Ashley

Boone NC

Verified

Product came in great shape even box was in good shape and received it fast

Would Recommend

Nice crankshaft

5.0

2 years ago

Bob

Highland Ny

Verified

This crank was shipped quickly Outer box was destroyed due to poor packing between the two boxes. Crank was ok. Was straight and true and balanced fine with no Mallory. Measured ok. Nice Crank

Would Recommend

Yes

5.0

2 years ago

None

Olathe ks

Verified

Waiting for engine to come back from the machine shop, I can't wait

Would Recommend

I will buy a 2nd. One as backup.

5.0

2 years ago

Randall

Tulsa, Ok

Nice piece. So far I have made around 75-80 passes. 6.20's at 110mph. S10 truck.

Would Recommend

I will be purchasing from these guys again

5.0

3 years ago

Traves Byers

Cleveland Tennessee

Verified

Bought this for a project I am working on with my son

Would Recommend

Why invest in an old crankshaft when you can buy this!?

5.0

3 years ago

Greenhill Garage

Montrose Colorado

Verified

I am building a sbc 406 budget 500hp engine. Rather than try to regrind the old worn crankshaft, I chose to buy this one. I originally thought I could build this engine without having to go to the machine shop, but after inspecting the cylinder walls, it is mandatory. I am using a sealed power flat top piston and I may even run a small nitrous setup. I am excited to see how this crankshaft holds up!

Would Recommend

Shipping was fast and price was right

5.0

4 years ago

Leon the lion

Gypsum Colorado

Verified

Perfect crank for my rebuild

Would Recommend

The only way to go!

5.0

7 years ago

Allend43

Porterville ca

Verified

Always measure on the money with dimensions. Why Chance a 45 year old used crank!? Pretty sure they are same foundry as scat. One or two I've bought actually said scat on them.

Would Recommend

Showing 9 of 9 reviews

Questions & Answers

6 Questions • 7 Answers

Does this crank need to be balanced before using? I have new set of pistons that say 400 with 5.7 rod already and rods

by Jason

• 7 years ago

1 answer

View Answer

Dose it come with rod and main bearings

by Rw

• 9 years ago

1 answer

View Answer

Do you or can you use your stock balancer and flexplate with this crank and will it support 500 hp?

by Weaver

• 10 years ago

1 answer

View Answer

Why won't it work with a 400 rod? That makes no sense whatsoever. If you have to use a 5.7 rod with this crank, what pistons do you use? Do you have to use pistons that are made to go with a 400 rod? If you have to use pistons made for a 5.7 rod, then a 400 rod with pistons made for a 400 rod should work with this crank. So please explain logically why you have to use a 5.7 rod with this crank.

by DJ Maintenance Services

• 10 years ago

1 answer

View Answer

is it for internal or external

by Jakcol75

• 12 years ago

2 answers

View Answers

can you use the stock piston with the 5.7 rod with the stroke on this crank

by zeasty03

• 13 years ago

1 answer

View Answer

6 of 6 questions shown

Fitment

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

  • 2-Piece Rear Main Chevy 400

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