King Engine Bearings GM Vortex / Gen III IV LS-Series Main Bearing Set

SKU: MB5876SI020

King Engine Bearings GM Vortec/Gen III IV LS-Series Main Bearing Set High-Performance Bi-Metal Solution

Elevate your engine rebuild with the King Engine Bearings MB5876SI020 Main Bearing Set, engineered for GM Vortec and LS-Series Gen III/IV engines. This premium bearing set delivers unmatched reliability and performance for enthusiasts, racers, and professional builders seeking a dependable foundation for their high-power builds. Crafted with precision and backed by King’s 60+ years of bearing expertise, this set is the go-to choice for GM LS engines, ensuring durability and smooth operation under demanding conditions.

Why Choose King Main Bearings?

King Engine Bearings stands out as a leader in bearing technology, with a focus on quality materials and innovative design. The MB5876SI020 set features a bi-metal aluminum-silicon alloy construction, ideal for medium-load engines and nodular cast iron crankshafts. King’s proprietary Bull’s Eye Tolerance™ technology ensures precise wall thickness and consistent fit, reducing wear and enhancing engine longevity. Whether you’re building a street machine, drag racer, or daily driver, these bearings provide the reliability and performance needed for your GM LS engine.

What’s Included in the Purchase?

• Complete Main Bearing Set: 5 pairs of bi-metal main bearings, designed for GM Vortec/LS-Series Gen III/IV engines.
• Part Number: MB5876SI020 (.020” undersize for precise fitment on machined crankshafts).
• Material: Aluminum-based with 2.5-3% silicon for enhanced strength and wear resistance.
• Warranty: Manufacturer’s warranty included.
• Packaging: Securely packed to ensure safe delivery.

Fitment Specifications

The MB5876SI020 Main Bearing Set is designed for the following GM Vortec/LS-Series Gen III/IV engines:

• Engines: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L (LS1, LS2, LS3, LQ4, LQ9, L92, L94, L76, L77, LY6, L96).
• Vehicle Compatibility:
  • 2004-2005 Rainier (CXL, CXL Plus)
  • 2009-2015 CTS V
  • 2002-2005, 2007-2016 Escalade (Base, Hybrid, Hybrid Platinum, Luxury, Platinum, Premium)
  • 2007-2016 Escalade ESV (Base, Luxury, Platinum, Premium)
  • 2007-2013 Escalade EXT (Base, Luxury, Premium)
  • 2007-2013 Avalanche (Black Diamond LS, LT, LTZ, LS, LT)
  • 2002-2006 Avalanche 1500 (Base, LS, LT)
  • 1999-2013 Silverado 1500 (Base, Hybrid, LS, LT, LTZ, SS, WT, XFE)
  • 2001-2014 Suburban 1500 (Base, LS, LT, LTZ)
  • 2000-2014 Tahoe (Base, Hybrid, LS, LT, LTZ, PPV, SSV)
  • 2002-2009 Trailblazer (EXT, SS)
  • 1998-2002 Camaro (Z28, SS)
  • 1997-2013 Corvette (Base, Grand Sport, Z06, ZR1)
  • 2006-2009 Impala SS
  • 2006-2007 Monte Carlo SS
  • 2007-2014 Sierra 1500 (Base, Denali, Hybrid, SLE, SLT, WT, XFE)
  • 2001-2014 Yukon (Base, Denali, Hybrid, SLE, SLT)
  • 2000-2014 Yukon XL 1500 (Base, Denali, SLE, SLT)
  • 2002-2009 Envoy (Denali, SLE, SLT)
  • 2003-2009 H2 (Base, Luxury, Adventure)
  • 2008-2009 G8 (GT, GXP)
  • 2004-2006 GTO
  • 2005-2009 9-7X (Aero, 5.3i)
  • Buick:
  • Cadillac:
  • Chevrolet:
  • GMC:
  • Hummer:
  • Pontiac:
  • Saab:

Note: Always verify fitment with your specific engine and crankshaft specifications before purchase.

Technical Specifications

• Size: .020” undersize (for crankshafts machined to .020” undersize).
• Construction: Bi-metal aluminum-silicon alloy, lead-free for OE replacement applications.
• Design Features:
• Bull’s Eye Tolerance™: Ensures minimal shell-to-shell thickness variation for a precise fit.
• U-Groove™: 90° oil groove design maintains oil flow while increasing load capacity.
• Elliptix™: Oil slot/oil hole hybrid improves oil ingress without compromising bearing surface.
• Radialock™: Enhances crush height for better load distribution and oil film stability.
• Applications: Suitable for stock rebuilds, performance builds, and medium-load racing applications.

Part Weight and Shipping Dimensions

• Weight: Approximately 1.2 lbs (based on similar King LS-Series bearing sets).
• Shipping Box Dimensions: 11.51” L x 4.29” W x 2.0” H.
• Shipping: Fast and reliable shipping with tracking information provided.

Manufacturer Details

King Engine Bearings, founded in 1960, is a global leader in high-quality engine bearings for automotive, racing, aviation, and marine applications. Their in-house design and manufacturing processes ensure every bearing meets strict quality standards. The MB5876SI020 set is part of King’s SI-Series, designed for GM LS engines with a focus on durability and precision.

Installation Notes

• Precision Fit: Bearings are stamped with size on the steel back. Verify size during installation to ensure proper fitment.
• Non-Adjustable: King bearings are precision-finished and should not be resized or modified.
• Professional Installation Recommended: For best results, have bearings installed by a licensed mechanic familiar with GM LS engines.

Why MB5876SI020 Stands Out

Unlike other bearing options, the King MB5876SI020 set combines advanced bi-metal construction with race-proven technology tailored for GM LS engines. Its aluminum-silicon alloy offers excellent strength for medium-load applications, while features like Bull’s Eye Tolerance™ and U-Groove™ ensure consistent performance and oil flow. Trusted by racers and engine builders worldwide, including USP Motorsports for their 1400-hp VR6 Audi S4 builds, this bearing set delivers the reliability and precision needed for both stock and performance applications.

Order Your King Main Bearing Set Today

Build your GM LS engine with confidence using the King MB5876SI020 Main Bearing Set. With its precise fitment, high-quality materials, and proven performance, it’s the ideal choice for your Vortec or LS-Series Gen III/IV engine.