King Engine Bearings Main Bearing Set (MB4057AM)
SKU: 98222954887

King Engine Bearings Main Bearing Set (MB4057AM)

Sale price$31.18 Regular price$34.65
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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
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 98222954887

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arisa
Lowell, US
★★★★★ 4
Great quality case, keyboard doesn’t work as intended
Color: Dark Cherry
Case is fine and good quality but the keyboard doesn’t work as intended. Bluetooth connects great but the keyboard is formatted incorrectly. For example, when I try to use a dash, it puts an apostrophe instead. I have no idea how to reformat it myself. I’d love just a replacement keyboard
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Reviewed in the United States on January 31, 2026
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Mia Thacker
Bozeman, US
★★★★★ 5
Worth it!
Color: Pink, Color: Pink
Great buy! Worth the money and the color is nice. The keyboard works, some buttons I haven’t figured out but for the most part it’s worth the purchase!
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Reviewed in the United States on May 20, 2026
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Ms Rene Butts
Belleville, US
★★★★★ 5
Nice colors
Color: Yellow
This was a perfect choice for my iPad. The color is very vibrant easy to put on and its sturdy will buy again in another color.
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Reviewed in the United States on May 17, 2026
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Bernie
West Palm Beach, US
★★★★★ 5
Keyboard is magnetic to cover so it doesn’t fall out
Color: Pink
Absolutely love this ! My iPad fits perfectly in this and the keyboard is touch sensitive which I like and the color combo on the keyboard makes it fun ! Definitely will recommend this
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Reviewed in the United States on June 11, 2026
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Susu
Whiting, US
★★★★★ 5
It’s a great value
Color: Black
My son is very happy with this iPad case. It fits perfectly, provides great protection against scratches and minor drops, and feels durable and well-made. The stand feature is very convenient for watching videos, reading, or working. It also has a sleek design and doesn’t add much extra weight to the device.
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Reviewed in the United States on June 8, 2026

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