Engines and Components› Engine Bearings

King Engine Bearings

King Engine Bearings Chevrolet 396/400/427/502 (Undersize 0.40in) SI-Series Main Bearing Set

$83.34

SKU: K006 MB556SI040

In Stock
In Stock
Ships by Jun 14
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The King Engine Bearings MB556SI040 is a SI-Series main bearing set designed for Chevrolet 396-502 GEN IV, V, and VI engines. This standard grade, bi-metal bearing set is constructed from an aluminum-based material strengthened with 2.5-3% silicon, making it suitable for medium load engines or those with nodular cast iron crankshafts. The bearing width measures 1.815 inches and 1.043 inches.

Fitment

Fitment Guaranteed

Don’t gamble
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.

Available on iOS & Android

Specifications

BrandKing Engine Bearings
Part NumberK006 MB556SI040

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.

View Full Return Policy