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Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series is a complete set of five bi-metal silicon aluminum bearings designed for Gen III and IV LS engines (4.8L to 6.2L). Engineered for both stock and performance builds, these bearings improve crankshaft surface conformity, reduce wear and vibration, and ensure reliable oil control for long-lasting engine performance.
| ASIN | B099KNX6Z3 |
| Bearing Number | LS 1 |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #45,700 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Engine Main Bearings |
| Brand | Michigan Motorsports |
| Brand Name | Michigan Motorsports |
| Compatible Lubricant | Oil |
| Customer Reviews | 4.7 out of 5 stars 113 Reviews |
| Included Components | (1) Complete Main Bearing Kit |
| Manufacturer | Michigan Motorsports |
| Material | Aluminum , Silicon |
| Material Type | Aluminum,Silicon |
| Model | Ai261 |
| Part Number | Ai261 |
| Set Name | Standard Size SI-Series |
| Specification Met | Manufacturer's Specifications |
| Unit Count | 1.0 Count |
| Warranty Description | 30 days |
T**N
Good product
No issues. They are exactly what they should be. They went in, tolerance was good. I don't see an issue.
N**A
Great company
Perfect fit and great company
C**M
Good product
Fast shipping
M**S
Good Deal!!!!!
Good Deal!!!!!
K**S
Great engine bearings
Great product works well very happy. Great shipping too very fast.
J**N
Main bearings
Very clean nice bearings
J**.
Love it
Love it
D**O
Poor design bearings
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
D**2
Quality product
I've bought numerous items from this company, not one problem to date. Fast shipping and you get what you ordered everytime
L**D
Proper parts
Quick delivery and great product t
J**S
Questionable but I put it in
Bought for a 2004 lm7 , bearings looked good other then the trust main has absoutly no locking tab, I'm nervous and unsure if it will last,
Trustpilot
3 weeks ago
3 weeks ago