SKU: 98222954887

King Engine Bearings Main Bearing Set (MB4057AM)

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Description

King Engine Bearings Main Bearing Set (MB4057AM)Todays sport compact race engines make more power than ever before. Yesterdays engine bearings load capacity no longer works for todays sport compact race engines. Tomorrows engines will be even more powerful. King bearings meet these demands with higher performance benchmarks, advanced materials and unique geometrical features. King Racings SV, GPC, XP, and XPC series of rod and main bearings were developed to meet these challenges through

Today’s sport compact race engines make more power than ever before. Yesterday’s engine bearings’ load capacity no longer works for today’s sport compact race engines. Tomorrow’s engines will be even more powerful.

King bearings meet these demands with higher performance benchmarks, advanced materials and unique geometrical features.
King Racing’s SV, GPC, XP, and XPC series of rod and main bearings were developed to meet these challenges through technologically advanced geometrical features and a unique metal structures. Together, they drive the industry to a higher level of durability, performance and expectation.

pMax Black is a unique tri-metal structure the has been developed to meet the ongoing demand for bearings with increased load capacity. As engines evolve and gain more power, engine bearings have to be able to handle the extra loading.

pMax Black consists of three layers that come together to form the strongest tri-metal bearing in the industry with load capacity exceeding the competition by as much as 24%. King Racing’s new hardening technology modifies the overlay molecular structure and creates a fatigue resisting shield.

The intermediate layer of a typical race bearing contains 2-3% tin, with hardness values of 90-95 HV. For a superior pMax Black intermediate layer, we increased the tin content to 4.5%, making it 22% harder (115 HV), with a load carrying capacity of 17,000 psi.

The overlay of a typical high performance bearing consists of a leaded alloy that contains 2-3% copper. It achieves a hardness level of 11 – 14 HV, and a maximum load capacity of 8,000-8,500 psi. King’s pMaxBlack overlay is significantly stronger than conventional overlays due to its 5% copper content and an innovative nano-scaled hardening process.

The pMaxBlack overlay contains 5% copper. It is further strengthened by a proprietary nano-scaled hardening process that modifies the molecular structure and creates a black fatigue-resistant shield. The outcome is a significant 29% increase in overlay hardness (18.1HV) and overall 24% increase in load capacity (10,200 psi).

SecureBond – Maximum tri-metal structural integrity

High loads and high RPM’s create critical stresses that travel through the multi-layer construction of a tri-metal race bearing. SecureBond is a micro-etch surface preparation process that strengthens the tri-metal structural integrity. SecureBond reduces the likelihood of catastrophic failure due to delamination of one layer from the other under extreme load conditions or metal–to-metal contact.

 



Check your bearing size using our fitment calculator here
Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 98222954887

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andy
Lowell, US
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Ture to size. Fits well, easy to Iron, very nice and comfortable
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Twin Mom
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Good quality dress shirt
Size: 16"-16.5" Neck 34"-35" Sleeve, Color: Black
this is a wrinkle resistant regular fit shirt with a regular sized length in both arms and at waist. The style is dressy and it is of very good quality material. It is a regular cut and not slim. Very nice shirt I recommend
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Reviewed in the United States on December 31, 2025
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Chef76
Lexington, US
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Good dress shirts
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Good fitting, well built and comfortable.
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Reviewed in the United States on April 9, 2026
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IU Fan
Waukegan, US
★★★★★ 5
Works for me!
Size: 15"-15.5" Neck 34"-35" Sleeve, Color: Hazy Blue
I needed a couple shirts for wearing under a sport coat, these will do nicely. I got them in Blue and Grey. As with all dress shirts, I’ll have to wash them to get the wrinkles out, I hit them with my portable steamer as well. They aren’t think enough to hold a good ironing unless you use spray starch, but for $20 I’m fine with that. The tag on the shirts said $60, I would be pretty disappointed if I actually paid $60 for them; but for $20 the value is good. I’m 5’8” and 180, so got the Medium 15/15 1/2 Regular fit, it’s a great fit for me. They came out of the wash fine, and are soft to the touch. I would expect them to wear as expected for a $20 shirt, and think the durability will be fine.
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Terese Terree Goble
Port Orchard, US
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Very Nice Dress Shirt for business Plus!
Size: 15"-15.5" Neck 32"-33" Sleeve, Color: White
My husband was pleasantly surprised as we never would have purchased a dress shirt on Amazon as never considered clothing as something marketed on Amazon. Gave it a try and everything was good.....fit, length, and fabric.
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Reviewed in the United States on February 10, 2026

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