CALL US (855) 998-8726 King Engine Bearings Main Bearing Set for 2013 INFINITI EX37(MB4524SI)
King Engine Bearings Main Bearing Set for 2013 INFINITI EX37(MB4524SI)
Carrying on a tradition of durability and dependability, KING Bi-Metal (aluminum) engine bearings feature 100% lead-free aluminum silicon. King has 4 different variations of their aluminum based bearings: (AM-Series) K-783 -Standard aluminum based material, equivalent to SAE-783, used for low and medium load engines. King AM-Series main and ...
King Engine Bearings

King Engine Bearings

King Engine Bearings Main Bearing Set for 2013 INFINITI EX37(MB4524SI)

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Carrying on a tradition of durability and dependability, KING Bi-Metal (aluminum) engine bearings feature 100% lead-free aluminum silicon. King has 4 different variations of their aluminum based bearings: (AM-Series) K-783 -Standard aluminum ... read more
  • Superior product quality
  • Higher level of precision
  • High efficiency
  • For more questions about this product, please Contact Us

Carrying on a tradition of durability and dependability, KING Bi-Metal (aluminum) engine bearings feature 100% lead-free aluminum silicon.

King has 4 different variations of their aluminum based bearings:

(AM-Series) K-783 -Standard aluminum based material, equivalent to SAE-783, used for low and medium load engines.

King AM-Series main and rod bearings are recommended for street or marine applications. They have superior embeddability, which provides greater macro-particle and reduces scratching of the crank journals and tearing or weakening of the Babbitt overlays. The direct replacements feature tolerance control up to +/- .0001—and they're lead-free, making them environmentally friendly and user-safe. Order the King AM-Series rod bearings in the application designed for proper fitment with your vehicle.

(SI-Series) K-788 -Aluminum based material, strengthen by 2.5-3% silicon, for medium load engines or nodular cast iron crankshafts.

King SI-Series main and rod bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main and rod bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

(SM-Series) K-789 -Aluminum alloy bonding layer. The strongest aluminum based material. The alloy is strengthened by addition of Manganese and Chromium (Mn, Cr), Used for high load applications.

For high load and performance applications, King SM-Series main and rod bearings are the strongest aluminum-based material offered by King. The alloy is strengthened by the addition of manganese and chromium. SM-Series crankshaft main bearings feature a traditional steel-backing, aluminum bonding layer, and the aluminum bearing alloy. They are available for a wide variety of vehicle and engine applications.

(HP-Series) K-787 - King HP-Series rod bearings were developed mainly for drag race applications needing a material harder than the Babbitt top layer. These applications demanded a structure that could withstand high loads for short durations and still offer higher embeddability and compatibility. In response, King developed the HP-Series featuring the Alecular metal structure.

The HP-Series is also suited for many performance applications with nodular cast iron crankshafts, such as street, strip, and some levels of Circle Track racing.

HP-Series bearings are particularly suitable for the following cases:

  • When a tri-metal bearing's Babbitt overlay extrudes over the sides, migrates to one end, or is physically removed by the crankshaft
  • When the intermediate layer of a tri-metal bearing is exposed, damaging the crank journal and requiring expensive grinding or replacement
  • When contaminants enter the oil stream, scratching and damaging the crankshaft journals

Check your bearing size using our fitment calculator here

Application List
ImageSKU / Part NoApplicationDetailStockPriceAdd to Cart
 MB4524SIInfiniti EX35 (2008-2012)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti EX37 (2013)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti FX35 (2009-2012)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti FX37 (2013)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti G35 (2007-2008)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti G37 (2008-2013)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti M35 (2009-2010)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti M35h (2012-2013)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti M37 (2011-2013)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti Q40 (2015)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti Q50 (2014-2021)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti Q50 (2014-2018)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti Q50 (2016-2022)3L V6 2997cc | VR30DDTTIn Stock$82.08BUY
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 MB4524SIInfiniti Q60 (2014-2016)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti Q60 (2017-2022)3L V6 2997cc | VR30DDTTIn Stock$82.08BUY
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 MB4524SIInfiniti Q70 (2014-2019)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti Q70 (2014-2018)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SIInfiniti Q70L (2015-2019)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti QX50 (2014-2017)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SIInfiniti QX70 (2014-2020)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SINissan 350Z (2007-2009)3.5L V6 3498cc | VQ35HRIn Stock$82.08BUY
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 MB4524SINissan 370Z (2009-2021)3.7L V6 3696cc | VQ37VHRIn Stock$82.08BUY
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 MB4524SINissan GT-R (2009-2022)3.8L V6 3799cc | VR38DETTIn Stock$82.08BUY
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bimetal (aluminum silicon base)
King Bearings
Return Policy

At JM Auto Racing we make returns and other client services as easy as possible. Our mission is to provide you with the best products and the best service in the automotive industry. We understand that sometimes, clients change their minds about products that they order or simply do not need them anymore. We also know that clients are cautious about terms and conditions since they are often tricky and misleading. Our goal is to make the return or exchange process trustworthy and as simple as 1-2-3.

Returns & Exchanges
If you are not satisfied with your purchase for any reason, we will be happy to accept a return for a refund or exchange on products in new/unused condition within 30 days of delivery. For orders placed during the holiday season from November 15th to December 31st, the return period is extended to 60 days. The following rules apply:

  • All returns and exchanges must be made via our Return Procedure with a valid & signed RMA form.
  • Returns will have a flat 15% restocking fee.
  • Product(s) must be in new condition and in the original packaging (please do not assemble, install, or modify the product in any way). In the event of fitment, flaw or defect pictures may be necessary to complete your request.
  • Any product that was used or fully/partially installed is non-returnable.
  • In some cases, return of the physical product may not be required. For these products, instructions will be provided on how to process a field destroy or dispose of the original item.
  • The few exceptions for items that cannot be returned include:
    • Items classified as “special order” or “made to order”
    • Custom Wheels & Tires Packages
    • Electronics
    • Any non-EPA compliant product including but non limited to catless test pipes, downpipes, headers and high flow cats. We will try to make as many accomadations as possible however a 25% restocking fee will apply. Please contact us to learn more.
  • To start your return please click HERE

We all know that things happen a people change their mind as soon as the purchase things. We take pride in how quickly we get things out the door and with 4 warehouses to ship from plus stock owned at our manufacturers, that speed is always increasing. This is why we only except full cancellations within 30 minutes of placing an in stock order. This helps us ensure your package gets out on the truck immediately or can be flagged before it goes through the packaging process. For orders that are not in stock or special order, we allow 24 hours. Cancellations can be done online by following the instructions found HERE or by emailing [email protected] ,

Your request will be processed as quickly as possible, but please note that sometimes products ship quicker than expected. After 24 hours, or after an out of stock item has been confirmed, fees will apply to all cancellations with the exception of Special Order items, made to order items or custom built items; which can not be cancelled after the 24 hour period. Items confirmed on reserve or pre-ordered are subject to a 10% cancellation fee.

Cancellations are subject to a 10% cancellation fee. This fee is not to rip you off in any way. When you place an order, we lose 3% due to credit card processing, and also another 3% to credit your account. The other 4% is much less then what is needed to cover all other costs and expenses lost by cancelling an order, that was already processed. This fee is will only be imposed on orders that have not shipped. If a special order has been placed, such as pistons, turbo's, etc., and the items are built and ready to ship out, and a cancellation is requested, a 25% cancellation fee will be imposed IF possible to be cancelled.

  • To start your cancel please click HERE

What are my shipping fees?
For orders delivered within the continental US where reason for return isn't a result of a JM Auto Racing error, the cost of the initial shipping charge and a return fee will be deducted from your refund. A prepaid shipping label(s) will be provided.
Freight, international & non-continental US returns are accepted, however coordination of return shipping is the responsibility of the client. In the event an error is made by JM Auto Racing, a return shipping label will be provided.

Сore deposits
Some products sold on JM Auto Racing include a core deposit. These parts have a deposit that is charged upon purchase and fully refunded upon the return of the core. Cores must be in rebuildable condition and matching vehicle application to the product sold. Once the product is received and inspected, the deposit will be refunded to your original form of payment. Note: Product cores returned that are not fully assembled or are not the unit that was removed from the vehicle, will not be refunded and the core will be discarded. Detailed instructions on Core Deposit Returns can be found here.

Defective, damaged, or incorrect products
We all know that accidents happen sometimes. If your product(s) arrive defective, damaged, or simply incorrect, please contact our customer service department as soon as possible. Please do not attempt to use, install, modify, or repair the part! We will send you a replacement part and provide you with a prepaid return label to return the defective part. In some instances, return of the product may not be required. Products must be returned to us within 30 days. If the damage was caused by a shipping courier, we will schedule a damage pick up by the courier. Photos of the damage, defect, or fitment issue may be requested in order to correctly process your request. For items mispackaged or missing, returns and replacements will be handeled as warranty requests, subject to manufacturer involvement and normally handled within 24-48 hours. Please note that products must be in the original packaging and there are additional requirements for products that ship freight.

LTL and Freight Shipments will cover the delivery of most oversized items, including but not limited to, body kits, hoods, trunks, spoilers, doors, roll cages. Items should be thoroughly inspected at time of delivery. Any damage NEEDS to be notated on the Bill of Lading prior to the driver leaving for an insurance to be valid. If damage, is not noted, the insurance is voided out and will need to be dealt with between you and the shipping carrier.

Billing, refunds & credits
Payment for orders placed using PayPal of Affirm will be captured as soon as the order has been successfully placed. Payments for orders placed using a debit or credit card will be authorized only and captured upon shipping. What does this mean? If your order is in stock, it will be charged normally. For out-of-stock items arriving within 30 days, you may see the authorization temporarily fall off. The funds will be placed back into your account and you won't see the pending charge from us. Once the item ships, you will see the funds deducted and the charge posted to your account. For out-of-stock items after 30 days, the above will take place, however we will have to recharge your card once the item is ready to ship.

Refunds for returned products are issued with 3-5 business days once they are received by our warehouse and inspected. Refunds will be issued via the same payment method originally used to place the order (Credit Card, PayPal, Google, Affirm, Check). All returns, where JM Auto Racing is not at fault, will have 15% restocking fee less than cost of freight. Free shipping items will have the initial freight fees deducted from the final refund. Shipping is only free if you keep the item you purchased. Some items will have a higher restocking fee. This information will be revealed to you up front upon requesting a return. Once the refund has been issued a confirmation email will be sent. Please allow an additional 5-7 days for the credit to appear on your account.

Shipping & delivery
To ensure a fast and safe delivery we use FedEx, DHL, Ontrac, USPS, & UPS Ground/Air shipping services. Available shipping methods may vary for different type of products and shipping destinations. Most products in stock ship same day, or within 1 business day after which its delivery can be tracked via tracking number sent to your email. For custom or made to order items shipping time varies as they may have to be manufactured, painted, embroidered, or assembled.

Please keep the following in mind:

  • Products that are oversized must ship truck freight / LTL which differs from ground shipments. NOTE: These oversized items require inspection and a signature upon delivery. For more information on freight shipping click here.
  • Shipments to Canada are treated as all other international shipments. It is the recipient's responsibility to pay all applicable duties, taxes, & brokerage fees. Detailed Info can be found here here.
  • Shipments to HI, AK, PR, Guam, Virgin Islands, APOs, & Canada might require extra shipping charges. International shipping quotes will be e-mailed to the customer before the credit card is charged.
  • Oversized items such as hoods, body kits, bumpers, tonneau covers, roofs, trunks and spoilers may require additional postage that is not displayed on the website. You will be contacted prior to the item shipping to confirm.

To request an international shipping quote before placing an orderIf you would like special shipping arrangements, please contact us via live chat, email or call us at 1.855.998.8726

In effort to provide our valued clients with the most up to date and accurate information, JM Auto Racing is continuously implementing real-time updates to our online superstore. Due to the immediate nature of these updates the correction of any errors and/or omissions can happen at any time without prior notice. This information may include but is not limited to pricing, availability, suggested use, fitment, compatibility, and warranties.

JM Auto Racing is not responsible for any additional charges, labor, loss, or damage incurred as a result of information, correct or incorrect, referenced or products purchased from JM Auto Racing. While we work to avoid any errors or omissions that may appear on the JM Auto Racing website, we do reserve the right to cancel any undelivered orders based on inaccurate information. more details

Additional Info

We are Bearing Specialists

King Engine Bearings was founded in 1960 with one objective: to supply the highest quality bearings available in the marketplace.

By specializing in engine bearings, King has built an extensive product offering that includes a wide range of engine bearings for automobiles, light-duty and heavy-duty trucks, marine, aviation, standby power and many other types of internal combustion engines. Every King bearing utilizes the highest quality materials and the most advanced designs to ensure complete customer satisfaction.

From concept to final product, everything is done under one roof. This allows King to produce bearings more efficiently and with more accuracy in order to keep up with the needs of our customers. During production, all bearings must pass rigorous quality control checkpoints throughout the entire process. This stringent system of multiple quality checks ensures that only the highest quality bearings ever make it into our customers’ hands.

King is the first choice in the extremely demanding; aviation; and racing industries due to our in-depth understanding of the specific needs of those industries. This knowledge and experience is then applied to every aftermarket bearing we make.

To achieve our goal of supplying the highest quality bearings, we had to reinvent the entire manufacturing process from the ground up, making King a pioneer in developing proprietary manufacturing machinery and multi-function, high speed  production lines.


All new King products are warranted to be free from defects for a period of one (1) year from the date of Activation and no longer than 2 years from the purchase date. Warranty applies for only for products which were activated in i-King system. Warranty is referring to King's products listed in King online catalog and only for King branded products in King boxes. Purchaser agrees that it's sole and exclusive claims against King Engine Bearings shall be limited to the claims set forth in the section “Warranty Limitations”. King will not be liable for any damage, resulting from delay in delivery or installation of the products or any failure to preform as a result of circumstances behind its control. Maximum liability for damages or injuries of any kind in property or persons, is limited to an amount of the purchased product, unless decided otherwise by King following King claim analysis.

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