SKU: 35339846495

King Engine Bearings Main Bearing Set (MB5730XP)

Sale price$177.93 Regular price$197.70
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Description

King Engine Bearings Main Bearing Set (MB5730XP)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

 

 

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SKU: 35339846495

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4.2 ★★★★★
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Scott S Sinno
Houston, US
★★★★★ 5
Good toy
Color: Hammer, Size: 7 Inch
Solid value for the $. The hammer seems particularly good, my bigger dogs like to hold it down by the head. I bought a 2nd.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
B
Verified Purchase
Bria Bermudez
Natrona Heights, US
★★★★★ 5
Skye loves it!
Color: Hammer, Size: 7 Inch
My heavy chewer loves these! I had to get the whole set because come on! Skye steals ALL my husbands tools so when I saw these and saw they’re real wood! (My dog is a wood chewing machine) (ask my deck) anyway these work and keep his teeth off my furniture! 10/10 recommend!
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Reviewed in the United States on March 22, 2026
K
Verified Purchase
Karen
Pawtucket, US
★★★★★ 1
Unsafe Toy
Color: Pliers, Size: 7 Inch
A waste of money for chewers. Within 10 minutes pieces started breaking off. Unsafe.
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Reviewed in the United States on June 12, 2026
C
Verified Purchase
Carmen Langton-Anson
Los Angeles, US
★★★★★ 5
Good toy for tough chewer.
Color: Hammer, Size: 7 Inch
My dog loved this toy. I would purchase again. Was a pretty tough toy, lasted longer than most.
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Reviewed in the United States on March 29, 2026
N
Verified Purchase
Nathan R
Belleville, US
★★★★★ 5
Durable
Color: Hammer, Size: 7 Inch
Even my monster hasn't been able to chew through these in a few months, and he has destroyed one of the black Kongs in the same time frame.
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Reviewed in the United States on May 24, 2026

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