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King Engine Bearings MB4080SI1.25 Main Bearing Set Si-Al Bi-Metal 0.025" Oversize

(Chevrolet Camaro 1985-95, S10 1986-93, Impala 2000-05, Malibu 1997-2003, Equinox 2005-09, Monte Carlo 1995-2005, Cavalier 1987-94 + 40 more models)

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB4080SI1.25
14 reviews
Sale Price

$43.28

Estimated ship date Monday, November 23

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Product Details

The King Engine Bearings MB4080SI1.25 is a complete main bearing set engineered for GMC 2.8L and 3.4L V6 engines (173ci and 207ci). Manufactured using King's Silicon Aluminum (Si-Al) Bi-Metal construction, this set delivers reliable performance and durability for medium-load applications.

Material & Construction:

  • Bi-Metal Silicon Aluminum — Aluminum-based bearing material strengthened with 2.5–3% silicon content
  • Optimized for medium-load engines and nodular cast iron crankshafts
  • Provides excellent conformability, embeddability, and corrosion resistance
  • Superior fatigue strength compared to standard babbitt-type bearings

Product Specifications:

  • Part Number: MB4080SI1.25
  • Type: Main Bearing Set
  • Material: Silicon Aluminum Bi-Metal
  • Size: 1.25mm Oversize (0.050")
  • Application: GMC 2.8L / 3.4L V6 — 173ci / 207ci

King Engine Bearings is a globally recognized manufacturer of precision engine bearings, known for tight tolerances and advanced metallurgy. The Si-Al series is a trusted choice for engine builders seeking a balance of strength and compatibility with cast iron crankshafts.

Products specifications

Fits

Chevrolet Camaro 1985-95, S10 1986-93, Impala 2000-05, Malibu 1997-2003, Equinox 2005-09, Monte Carlo 1995-2005, Cavalier 1987-94, S10 Blazer 1986-89, 1991-94, Venture 1997-2005, Lumina 1990-2001, Corsica 1987-96, Celebrity 1986-90 + 35 more models

Flange Oversize

FL ON MAX

Material

bimetal (aluminum silicon base)

Undersize

1.25

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