My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

King Engine Bearings MB5721XP025 Main Bearing Set for Nissan - SR20DET

Part of: King Engine Bearings Main Bearing Set Oversize

Other options in this family: King Engine Bearings MB5835SI0.5 King Engine Bearings MB5557SI0.75 King Engine Bearings MB4102SI0.25 King Engine Bearings MB5280SI0.5 King Engine Bearings MB5770SI0.25

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB5721XP025
13 reviews
Sale Price

$117.54

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The King Engine Bearings MB5721XP025 is a high-performance main bearing set engineered specifically for the Nissan SR20DET (GT-IR) 16-valve engine. This XP Series bearing set features King Racing's advanced pMax Black tri-metal construction, delivering exceptional durability and load capacity for demanding performance applications.

Key Features:

  • pMax Black Tri-Metal Construction: 24% harder than conventional tri-metal race bearings, providing superior resistance to wear and deformation under extreme loads
  • Enhanced Load Capacity: 15-30% greater load capacity than traditional bearings, ideal for high-output forced induction applications
  • SecureBond Adhesion: Proprietary bonding process ensures superior stability between bearing layers, preventing delamination
  • Hardened Performance Overlay: 0.0005" metallurgically enhanced overlay resists surface fatigue and withstands greater loads
  • Bulls Eye Tolerance: Industry-leading wall thickness tolerance with all shells matched to 0.0001" for precise fitment
  • Half-Grooved Design: Mains feature 1/2 groove configuration for uncompromised lower shell load capacity
  • Optimized Oil Flow: Enlarged, chamfered oil holes improve lubrication delivery
  • Medium Eccentricity: Promotes optimal load distribution and enhanced oil film characteristics

Designed for high-load, long-duration racing applications including circuit racing, drag racing, and street performance where forged steel crankshafts are used. The XP Series represents King Racing's commitment to advanced metallurgical and geometric technologies that meet the extreme demands of modern high-performance engines. This set includes all main bearings required for a complete installation on the SR20DET engine.

Note: This is an oversize bearing set (+0.25mm) designed for use with crankshafts machined to accommodate oversize bearings.

Products specifications

Undersize

0.25

Material

pMax Black (racing line)

thanks

Shipping not best

Quick and Easy

Great products and great prices all around.....just took lil longer than expected to process and ship

Fast and conveniant

First purchase , hope it all goes as smooth as ordering .

Very competitive pricing (within best 2-3 prices I could find anywhere online) on a foam kayak carrier kit. Shipping was a little high relative to competition, but base price was good enough that with this stellar reputation on RR, ordering from them seemed the right way to go. Ordered 2/17, received it on 2/20 - so *excellent* performance on the delivery side. Satisfied with my decision to shop here. Will eagerly consider them again in the future.

Very easy to navigate website. I recived my order quick and it was also the cheapest online.

Easy to find my b part number and fast ordering.

Thanks!

What a great find! These people are very helpful and their prices are better than 4 wheel parts! The only thing I wish was improved was the handling time to be less than 4 days for 1 item, but other than that, I'm happy.

Really easy

I haven't received my order yet but I am satisfied at how fast the order was processed and shipped. The website was very easy to navigate and best of all the prices were hard to beat. I believe I will be visiting this site again.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy