Sealed Power MA Series Main Bearings

4.29 out of 5 stars 75 Customer Reviews

These Sealed Power MA Series main bearings can actually polish the journals on your crankshaft. That's because there's a small percentage of silicon mixed in with the aluminum and tin that make up the bearing-surface alloy. The silicon is there for wear resistance, but its toughness actually smoothes the journals of a crank whose surface hasn't been optimized! This special surface alloy is laid over a high-strength 1010 steel backing and delivers improved seizure and corrosion resistance, as well as better control of wall variance. It also helps to minimize debris embedding, which can score the crank's surface.

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Sealed Power MA Series Main Bearings 7298MA

Main Bearings, MA-Series, Bi Metal, Standard Size, Chevy, 4.8, 5.3, 5,7, 6.0L, Set of 5

Part Number: SLP-7298MA

4.45 out of 5 stars ( 11 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 4125MA

Main Bearings, MA Series, Standard Size, Bi Metal, 1/2 Groove, Ford, Lincoln, Mercury, V8, 221, 260, 289, 302, Set of 5

Part Number: SLP-4125MA

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 5085MA

Main Bearings, Standard Size, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 4125MA20

Main Bearings, MA Series, 0.020 in. Crankshaft Undersize, Bi Metal, 1/2 Groove, Ford, Lincoln, Mercury, V8, 221, 260, 289, 302, Set of 5

Part Number: SLP-4125MA20

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 5095MA

Main Bearings, Standard Size, Bi Metal, Full Groove, Chrysler, Dodge, Plymouth, 318, Set of 5

Part Number: SLP-5095MA

Not Yet Reviewed

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 7298MA10

Main Bearings, 0.010 in. Crankshaft Undersize, Bi Metal, 1/2 Groove, Chevy, GMC, Pontiac, 4.8L, 5.3L, 5.7L, 6.0L, Set of 5

Part Number: SLP-7298MA10

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 4125MA10

Main Bearings, MA Series, 0.010 in. Crankshaft Undersize, Bi Metal, 1/2 Groove, Ford, Lincoln, Mercury, V8, 221, 260, 289, 302, Set of 5

Part Number: SLP-4125MA10

Not Yet Reviewed

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 7245MA

Main Bearings, Standard Size, Bi Metal, 1/2 Groove, Ford, Mazda, V6, 2.9L, 4.0L, Set of 4

Part Number: SLP-7245MA

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 5085MA10

Main Bearings, 0.010 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA10

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

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Estimated Ship Date: Oct 15, 2025 if ordered today

Sealed Power MA Series Main Bearings 5095MA10

Main Bearings, 0.010 in. Crankshaft Undersize, Bi Metal, Full Groove, Chrysler, Dodge, Plymouth, 318, Set of 5

Part Number: SLP-5095MA10

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

Sealed Power MA Series Main Bearings 5085MA20

Main Bearings, 0.020 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA20

Not Yet Reviewed

Estimated Ship Date: Oct 14, 2025 if ordered today

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Estimated Ship Date: Oct 14, 2025 if ordered today

Sealed Power MA Series Main Bearings 7245MA20

Main Bearings, 0.020 in. Crankshaft Undersize, Bi Metal, 1/2 Groove, Ford, Mazda, V6, 2.9L, 4.0L, Set of 4

Part Number: SLP-7245MA20

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

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Estimated Ship Date: Oct 15, 2025 if ordered today

Sealed Power MA Series Main Bearings 5085MA30

Main Bearings, 0.030 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA30

Not Yet Reviewed

Estimated Ship Date: Oct 14, 2025 if ordered today

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Estimated Ship Date: Oct 14, 2025 if ordered today

Sealed Power MA Series Main Bearings 5085MA40

Main Bearings, 0.040 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA40

Not Yet Reviewed

Estimated Ship Date: Oct 14, 2025 if ordered today

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Estimated Ship Date: Oct 14, 2025 if ordered today

Sealed Power MA Series Main Bearings 4125MA30

Main Bearing Set;

Part Number: SLP-4125MA30

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

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Sealed Power Main Bearing Sets 4125M30

5 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Sealed Power MA Series Main Bearings 7144MA40

Main Bearings, 0.040 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Buick, V6, 3.0L, 3.8L, Set of 4

Part Number: SLP-7144MA40

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Sealed Power MA Series Main Bearings 4125MA40

Main Bearing Set;

Part Number: SLP-4125MA40

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

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Estimated Ship Date: Oct 15, 2025 if ordered today

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