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King Engine Bearings MB5531SI1.0 Main Bearing Set Silicon Aluminum Oversize - 1.0mm

Part of: King Engine Bearings Main Bearing Set Oversize

Other options in this family: King Engine Bearings MB5835SI0.5 King Engine Bearings MB5280SI0.5 King Engine Bearings MB5557SI0.75 King Engine Bearings MB5770SI0.25 King Engine Bearings MB5845SI

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB5531SI1.0
10 reviews
Sale Price

$80.34

Estimated ship date Saturday, November 21

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Product Details

The King Engine Bearings MB5531SI1.0 is a complete main bearing set engineered for the Chevrolet 121 engine. This set is manufactured in a +1.0mm oversize to accommodate reground or worn crankshaft journals, restoring proper oil clearances during engine rebuilds.

Material & Construction:

  • Bi-Metal Silicon Aluminum (SI Series) — an aluminum-based bearing material strengthened with 2.5–3% silicon content
  • Well-suited for medium-load engine applications and engines equipped with nodular cast iron crankshafts
  • Silicon aluminum alloy provides excellent conformability, corrosion resistance, and reliable fatigue strength for everyday driving demands

King Engine Bearings SI Series Advantages:

  • Precision-machined to strict dimensional tolerances for consistent oil film and journal protection
  • Aluminum-based construction offers superior corrosion resistance compared to babbitt alloys
  • Designed for OEM-replacement and light performance rebuild applications
  • Manufactured by King Engine Bearings, a specialist bearing producer with decades of engineering expertise

The MB5531SI1.0 main bearing set is an ideal choice for engine rebuilders seeking a reliable, cost-effective bi-metal bearing solution in a +1.0mm oversize for the Chevrolet 121 engine platform.

Products specifications

Undersize

1.0

Flange Oversize

FL ON MAX

Material

bimetal (aluminum silicon base)

Great

Awsome service and prices,Thanks alot

So far so good!

easy website to use

I just place order... I will wait to mke sure part and service is good..

Easy ordering. Cheap prices. Free shipping or lower shipping would be nice but still better priced

Quick, easy to find cheap parts

Excellent!

good prices

I ordered a rear sway bar for my MINI Cooper on Sunday and it was at my door on Wednesday! Autoplicity had the absolute cheapest price for this bar and I was very impressed with the shipping speed. I would definitely recommend them to my friends!

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