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  • Item #: MB-557-SI-020



.020 OVER

These bearings will fit SBC 350, and 383 engines among others.

We use King Bearings in both our street and race motors and have always been extremely pleased with their quality and craftsmanship.


King Bearings feature a "Bulls Eye" Tolerance:

Bull’s Eye Tolerance Improves Consistency

“Bull’s Eye Tolerance” is how we refer to King’s ultra-tight control of wall thickness tolerance.

Inconsistent shell-to-shell bearing wall thickness can have a negative impact on clearances between the bearing and the journal on main and connecting rod bearings. Engine builders typically find themselves having to compensate for these inconsistencies.

But King has removed the inconsistency factor by using advanced quality control procedures. Utilizing these statistical control methods, we are able to maintain rod and main bearing wall thickness tolerances at an amazingly tight 0.00010". This is far tighter than other manufacturers, who produce bearings with a wall thickness at the crown that can vary by up to 0.00025".

Bull’s Eye Dimensions



There are many benefits to "Bull's Eye" control of wall thickness tolerance:

  • Improved consistency of bearing-to-journal clearance, so you never have to worry about King bearings having the right fit within a set.
  • Superior eccentricity and crush relief values for a better oil "wedge" and less journal wear.
  • Decreased taper across the bearing face, yielding superior wall stability, a more parallel wall and better oil film development.
  • No need to grind cranks "fat" or "thin" to compensate for bearing wall variations.


What makes King Engine Bearings Track Tough and Street Smart?


All King Performance bearings feature:


Tolerance Control: the closest wall tolerances in the industry – Bull’s Eye Tolerance, with all shells matched to .0001"


Increased Height: greater rod bearing height improves bearing to bore contact/heat transfer and reduces spin potential at high RPM


Improved Oiling: mains feature enlarged, chamfered oil holes and ¾ grooving


Medium Eccentricity: enables optimum load distribution and improved oiling


Dowel Holes: most rod bearings are available with or without dowel holes


Narrowed Design: mains and rods are narrowed for large radii crankshafts

To keep our prices low, we will ship this item the best way possible. We ship with UPS and USPS, and will choose the carrier that has the best rate and service to your area. Your tracking number will tell you how your item will be shipped.

 **NOTE: shipping prices listed are for the contiguous 48 US states only. There may be additional postage required to ship items to Alaska, Hawaii, Puerto Rico and other US territories. If additional postage is required, we will contact you through e-mail to let you know. If you live outside of the contiguous US, please request a shipping quote prior to purchase to avoid any delays in shipping your item.

We have been in business for over 30 years building some of the fastest race engines in the southeast with the best parts around and we are excited to now offer these parts to you at affordable prices. Our machinists are the best in the business and our sales staff is friendly and knowledgeable. Please give us a call with any questions about our items, we will be happy to talk to you about your project:


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Price $14.25
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