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Your cart is empty.Michigan Motorsports Main Bearings Main Bearings, SI-Series, Standard Size, Bi-metal, Silicon Aluminum, Chevy 4.8 5.3 5.7 6.0 6.2 Gen 3/4 Set of 5 Michigan Motorsports SI-Series main bearings are recommended for stock or performance engines using factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. 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.
Ryan
Reviewed in the United States on March 3, 2025
Great product works well very happy. Great shipping too very fast.
Eric
Reviewed in the United States on February 23, 2025
These are repackaged 5293 King Bearings, they can be purchased for about $20 less if you just buy them under their original brand. Good bearings, but dishonest packaging and pricing.
Don Dalessio
Reviewed in the United States on January 3, 2025
This is a very important question. I’ve been an engine builder for over 40 years all the bearings except for the thrust bearings. Do not have a notch to lock into the block and main cap on both sides of the bearings. If at any time these bearings would walk in the block board this would not allow oil to get through the crankshaft or camshaft it would close off the oil hole in the block. This is a very poor design bearing would not recommend using them at all. Why make every bearing except for two bearings with the lock on them, and yet the two biggest bearings without it this will cause major engine failure and there is nothing there to hold those bearings from not turning in the bore The main cap is bolted to the block. With two locks on either side for bearing would not recommend there’s no way of locking these bearings in so they don’t turn
John Hogan
Reviewed in the United States on December 10, 2024
Very clean nice bearings
James P.
Reviewed in the United States on October 27, 2024
Love it
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