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King Engine Bearings

King Engine Bearings

King SI-Series Main Bearings MB 621SI0.25 Bearings, SI-Series, Bi-metal, 0.25mm Crankshaft Undersize, Ford, 6.8L, Set of 5

SKU: KINGMB_621SI0.25

Main Bearings
King SI-Series Main Bearings MB 621SI0.25 Bearings, SI-Series, Bi-metal, 0.25mm Crankshaft Undersize, Ford, 6.8L, Set of 5
King Engine Bearings

King Engine Bearings

King SI-Series Main Bearings MB 621SI0.25 Bearings, SI-Series, Bi-metal, 0.25mm Crankshaft Undersize, Ford, 6.8L, Set of 5

SKU: KINGMB_621SI0.25

Main Bearings
A$165.49
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

King SI-Series main bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

Part Type

Main Bearings

Data: v4.2 - Upd: 2026-10-14 17:10:12

Specifications

Product Attributes - Brand
King Engine Bearings
Product Attributes - Manufacturer's Part Number
MB 621SI0.25
Product Attributes - Part Type
Main Bearings
Product Attributes - Product Line
King SI-Series Main Bearings
Product Attributes - UPC
611500450488
Product Attributes - Bearing Usage
Direct replacement
Product Attributes - Engine Crankshaft Undersize (in.)
0.010 in.
Product Attributes - Engine Crankshaft Undersize (mm)
0.25mm
Product Attributes - Grooved Bearing
Yes
Product Attributes - Groove Location
Upper
Product Attributes - Groove Style
1/2
Product Attributes - Thrust Bearing Oversize
Stock
Product Attributes - Bearing Material
Bi-metal, silicon aluminum
Product Attributes - Quantity
Sold as a set of 5.

Reference Information

Brand Name/s King Engine Bearings
StreetFX SKU kingMB_621SI0.25
SFX Item ID 4858462
Supplier Item Code 4858462
Manufacturer SKU MB 621SI0.25
Manufacturer UPC N/A
Alternative References KGB-MB621SI025, 621SI0.25, 0.25mm, 6.8L

Compatibility

Application Data
  • MakeFORD
    Beginning Year1997
    Ending Year2006
    Engine TypeV10
    Engine FamilyFord modular V10
    Engine Size6.8L/415

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