Exterior Components› Body Panels and Components
King Engine Bearings
MB5257SIGENERAL MOTORS 379 V8 OHV
SKU: K006 MB5257SI
Easy — 1–2 hours
Description
MIA's Description
These bearings offer improved oil clearance to reduce wear, increase engine life, and minimize operating noise, vibration, and excess oil flow. They are recommended for engines with factory crankshafts and feature an improved crankshaft finish for better performance on various crankshaft types.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | King Engine Bearings |
| Part Number | K006 MB5257SI |
Videos
King Engine Bearing & Crankshaft Installation Guide Feat. XP Bearings
The BEST Bearings For Your Build - King Engine Bearings pMaxKote
Main Bearings Installation
Engine bearing Size and Terminology - Jay's Tech Tips
PRI 2018: King Engine Bearings Handling Anything Your Engine Internals Throw At It
Engine Bearings Basic Tech and Why it Matters
Engine Bearing Tech Myths | What You Really Need To Know
Which King Engine Bearing is best for your application
Everything you need to know about Engine/Main Bearings
Adding Oil On The Back Side Of Bearings During Engine Assembly. Good Or Bad?
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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