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King Engine Bearings MB5558SI0.75 Main Bearing Set +0.75mm Oversize Si-Series

(2000-2004 Ford Focus; 1985-2002 Ford Escort; 1986-1988 Ford EXP; 1991-1999 Mercury Tracer; 1985-1987 Mercury Lynx)

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB5558SI0.75
13 reviews
Sale Price

$29.14

Estimated ship date Wednesday, November 25

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Product Details

The King Engine Bearings MB5558SI0.75 is a +0.75mm oversize crankshaft main bearing set engineered for Ford R6A inline-six engines displacing 114ci (1.9L) and 121ci (2.0L). Built on King's proven SI-Series (K-788) bi-metal platform, these bearings deliver reliable performance for OE-spec engine rebuilds and performance applications using factory crankshafts.

SI-Series Silicon Aluminum Material:

  • Bi-metal construction — aluminum alloy bearing surface bonded to a steel backing for strength and dimensional stability
  • 100% lead-free silicon aluminum formulation, making these bearings environmentally friendly and user-safe
  • Aluminum base alloy strengthened with 2.5–3% silicon, optimized for medium-load engines and nodular cast iron crankshafts
  • Improved crankshaft finish compatibility — reduces microscopic ferrite peaks on improperly ground or polished nodular cast iron journals
  • Improved oil clearance to reduce wear, increase engine life, and lower operating noise, vibration, and excess oil flow
  • Precision tolerance control to ±0.0001 inches for consistent, accurate fitment

Product Details:

  • Part Type: Crankshaft Main Bearing Set
  • Series: SI-Series (K-788)
  • Material: Bi-Metal — Silicon Aluminum
  • Size: +0.75mm Oversize
  • Manufacturer Part Number: MB5558SI0.75

King Engine Bearings has specialized exclusively in engine bearings since 1960, applying knowledge gained from demanding aviation and racing applications to every bearing they manufacture. The SI-Series is the recommended choice for OE replacement and aftermarket gasoline or diesel engine rebuilding with factory crankshafts.

Products specifications

Fits

2000-2004 Ford Focus; 1985-2002 Ford Escort; 1986-1988 Ford EXP; 1991-1999 Mercury Tracer; 1985-1987 Mercury Lynx

Undersize

0.75

Material

bimetal (aluminum silicon base)

Flange Oversize

FL ON MAX

thanks

I received my parts when I needed them by and they were quality parts.

Very nice and easy

Smoothly designed web site, and I appreciate the convenience of the optional payment via Amazon.

good price

had the brand i was looking for and at a really good price

Ordering was easy. Hope the parts fit my car.

great to show number in stock and easy/quick payment options. Always love free shipping!

This site was just like shopping at a real store. It was easy to make my order and I was able to do it on the go on my smartphone which is important to me that a site is compatible with handheld. Bravo

very cheap prices compared to competitors hoping product is as good as price.

Extremely easy to find the parts and place the order

Cheapest I can find for this product. I would buy from this seller again.

Super fast shipping, exactly as ordered, no drama, problems or complications

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