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King Engine Bearings MB557SI040 Main Bearing Set for GM Small Block - V8

(GMC G2500 1979-95, Yukon 1992-2000, K1500 1979-86, 1988-99, C1500 1979-86, 1988-99, K2500 1979-86, 1988-2000, Jimmy 1970-91 + 225 more models)

Part of: King Engine Bearings Main Bearing Set Oversize

Other options in this family: King Engine Bearings MB5835SI0.5 King Engine Bearings MB5557SI0.75 King Engine Bearings MB4102SI0.25 King Engine Bearings MB5280SI0.5 King Engine Bearings MB5770SI0.25

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB557SI040
7 reviews
Sale Price

$22.92

4 left at this price

delivery box

Usually delivered within 2 days

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Product Details

The King Engine Bearings MB557SI040 main bearing set is engineered for General Motors small block V8 engines, including 262, 267, 302, 307, 327, and 350 cubic inch variants. This precision-manufactured bearing set provides reliable crankshaft support for medium-load applications and nodular cast iron crankshafts.

Construction and Material:

  • Bi-metal silicon aluminum construction for enhanced durability
  • Aluminum-based material strengthened with 2.5-3% silicon content
  • Optimized for medium load engine applications
  • Compatible with nodular cast iron crankshafts
  • 0.040" oversize for precision machining applications

Application Coverage:

  • GM 262 ci (4.3L) V8 engines
  • GM 267 ci (4.4L) V8 engines
  • GM 302 ci (5.0L) V8 engines
  • GM 307 ci (5.0L) V8 engines
  • GM 327 ci (5.4L) V8 engines
  • GM 350 ci (5.7L) V8 engines

King Engine Bearings are manufactured to strict OEM tolerances, making them an ideal choice for engine rebuilds, performance builds, and professional machine shop applications. The silicon-aluminum alloy provides excellent wear resistance and thermal stability for long-lasting engine protection.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-2000, K1500 1979-86, 1988-99, C1500 1979-86, 1988-99, K2500 1979-86, 1988-2000, Jimmy 1970-91, Savana 2500 1996-2002, Savana 3500 1996-2002, Savana 1500 1996-2002, C3500 1979-86, 1988-2000 + 221 more models

Bearing Material

Bi-metal, silicon aluminum

Bearing Usage

Direct replacement

Groove Location

Upper

Groove Style

1/2

Grooved Bearing

Yes

Quantity

Sold as a set of 5.

Material

bimetal (aluminum silicon base)

Flange Oversize

FL ON MAX

Undersize

040

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Title

King Bearings

Good so far

Lowest price and S&H around! Prompt responses! Will def buy from again!

Very easy system!! Thanks!!

I looked around for few months on where to go to purchase JBA headers for my 01 Tundra. I came across Autoplicity and their prices were untouchable. I even called to speak with a sales representative and he gave me a discount code for my purchase. I would highly recommend doing business and plan on doing more business with them.

Great site. Easy to locate items and they have the best prices! I will be using this site for all my custom parts.

Best price I could find on line, shipped really fast. With how low the price is I was worried but everything came fast and it was the correct parts. This place really keeps the cost of racing down.

Best price I could find anywhere. Almost 10% less than my typical sources and the item shipped in less than 24 hrs.<br>

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