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King Engine Bearings

King Engine Bearings Porsche M 48 / M 48.50 (Size STD) Main Bearing Set

$62.10

SKU: K006 MB5790SI

Special Order
Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The King Engine Bearings MB5790SI is a set of SI-Series main bearings designed for OE applications and aftermarket engine rebuilding. These replacement bearings are compatible with performance engines utilizing factory crankshafts. They feature an improved crankshaft finish to reduce microscopic ferrite peaks on cast iron crankshafts and improved oil clearance to minimize wear, reduce operating noise, and excess oil flow.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandKing Engine Bearings
Part NumberK006 MB5790SI

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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