Main Bearing Set
Hover over the image to zoom in
Share this:

Sealed Power Main Bearing Set

Part No. 4663MA Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

Federal-Mogul's innovative Sealed Power "A-series" boredĀ aluminum bearings are ultramodern bimetalĀ bearings that offer increased wear resistance.
Back To Top
Cylinder Block Housing Bore, Max:2.642 in
Cylinder Block Housing Bore, Max:67.094 mm
Cylinder Block Housing Bore, Min:2.641 in
Cylinder Block Housing Bore, Min:67.071 mm
OE Replacement:Yes
Package Quantity:5
Set Contents:Bearing A Main Plain / Qty 4 Installed in Journal
Standard Bearing Wall, Max:0.095 in
Standard Bearing Wall, Max:2.423 mm
Standard Shaft Diameter, Max:2.449 in
Standard Shaft Diameter, Max:62.212 mm
Standard Shaft Diameter, Min:2.448 in
Standard Shaft Diameter, Min:62.189 mm


by PowerReviews
Sealed PowerMain Bearing Set

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top

(7 of 13 customers found this review helpful)


Good Stuff


from Lincoln, NE

See all my reviews

Ask me a question

Verified Buyer
3 or more reviews submitted


  • Easy To Install


    Best Uses

    • Everyday Driving
    • Performance Driving
    • Replacement
    • Restoration

    Comments about Sealed Power Main Bearing Set:


    • Car & Truck:
    • Auto Enthusiast, Mechanic, Truck Enthusiast

    Displaying review 1

    Back to top

    Do you have questions about this product?


    Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      Hi, what are the differences between part #s 4663m and 4663ma. I realize one is aluminium. Which is better for a stock to slightly modified engine?
      Asked on 3/14/2012 by Anonymous

      1 answer



        This Sealed Power Main Bearing Set (Part No. 4663MA) is direct replacement bearing and it is made of Tri metal copper-lead alloy and this Sealed Power Main Bearing Set (Part No. 4663M) is preformance bearing and it is made of Bi metal aluminum alloy, A-Series.

        Answered on 3/16/2012 by Dennis from AAP
    Displaying question 1

    Do you have a question about this product? 

    Check out the specials in our monthly flyer.
    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.