Product Overview
King Racing MB7779XPC Polymer Coated Main Bearings for BMW B58 & Toyota GR Supra
Upgrade your engine’s internal durability with the King Racing MB7779XPC polymer coated main bearings, engineered for the BMW B58 3.0L turbocharged inline-six engine found in selected BMW performance models and the Toyota GR Supra.
These premium racing main bearings feature King’s advanced pMaxKote™ polymer coating, pMaxBlack™ overlay technology and precision-engineered tri-metal construction. Designed for demanding high-performance engine applications, the MB7779XPC bearing set provides improved wear resistance, seizure protection and dependable crankshaft support.
Whether you’re rebuilding a BMW B58 engine, preparing a Toyota GR Supra for track use or assembling a high-performance turbocharged engine, King Racing main bearings offer precision-engineered protection for demanding applications.
Why Choose King Racing MB7779XPC Main Bearings?
The BMW B58 is a popular platform for performance tuning and motorsport engine builds. As engine output and operating loads increase, selecting suitable crankshaft bearings becomes especially important.
King Racing developed its XP racing bearing technology to support demanding engine applications through advanced metallurgy, carefully controlled clearances and optimised bearing geometry.
The polymer-coated MB7779XPC version adds another layer of protection for high-performance BMW B58 engine builds.
1. Advanced pMaxKote™ Polymer Coating
The King Racing MB7779XPC features King’s proprietary pMaxKote™ ceramic nano-composite polymer coating.
Applied directly over the pMaxBlack™ overlay during manufacturing, the coating enhances protection during demanding engine operating conditions.
Key benefits include:
- Improved resistance to bearing wear
- Increased protection against seizure
- Enhanced resistance to cavitation damage
- Additional protection during brief periods of reduced lubrication
- Factory-applied coating with no added nominal bearing wall thickness
Unlike some aftermarket bearing coatings, pMaxKote™ is engineered to preserve the bearing’s original precision wall-thickness specification.
2. High-Strength pMaxBlack™ Technology
King Racing’s pMaxBlack™ technology incorporates a proprietary hardened overlay designed to improve bearing load capacity and fatigue resistance.
This technology helps the bearing withstand demanding crankshaft loading conditions commonly experienced in highly modified turbocharged engines.
Combined with pMaxKote™, it provides a protective bearing surface suitable for performance-oriented engine builds.
3. Precision Tri-Metal Construction
King Racing MB7779XPC bearings feature a copper-based tri-metal structure designed for strength and reliable engine operation.
Their precision-engineered construction supports:
- High-load crankshaft operation
- Consistent lubrication performance
- Stable bearing clearances when correctly installed
- Demanding performance engine applications
- Reliable support of the crankshaft under appropriate operating conditions
4. Complete Seven-Pair Main Bearing Set
Each King Racing MB7779XPC set contains seven pairs of main bearings, providing the 14 bearing shells required for the supported B58 crankshaft main bearing positions.
The bearing set includes the correct arrangement for main bearing positions 1–7.
5. Designed for BMW B58 Performance Engines
The BMW B58 3.0L turbocharged engine is used in several performance-oriented BMW models, including selected 140i, 240i, 340i, 440i and 540i applications.
The same engine family also powers the Toyota GR Supra 3.0L.
The MB7779XPC is intended for compatible B58 engines, but buyers should verify their exact engine variant and bearing dimensions before purchase.
King Racing MB7779XPC Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | King Engine Bearings |
| Part Number | MB7779XPC |
| Product Type | Racing Main Bearing Set |
| Engine Application | BMW B58 3.0L |
| Bearing Construction | Copper-Based Tri-Metal |
| Polymer Coating | pMaxKote™ |
| Racing Overlay | pMaxBlack™ |
| Quantity | 7 Pairs / 14 Bearing Shells |
| Standard Wall Thickness | 2.500mm nominal |
| Size Options | STD, STDX, 0.25mm |
| Vehicle Applications | Compatible BMW B58 and Toyota GR Supra engines |
Available King Racing MB7779XPC Bearing Sizes
The MB7779XPC main bearing range is available in multiple sizes to suit different engine-building requirements.
Standard (STD)
Designed for applications requiring the manufacturer’s standard bearing size.
Standard Extra Clearance (STDX)
An additional-clearance option intended for engines requiring increased oil clearance, as determined by accurate engine measurements.
0.25mm Undersize
Designed for a correctly prepared crankshaft with the corresponding undersize main journals.
Important: Bearing size must be selected according to measured crankshaft journal dimensions, housing measurements and the required assembled oil clearance. Do not choose a bearing size based solely on the vehicle model.
BMW B58 & Toyota GR Supra Engine Compatibility
King Racing MB7779XPC main bearings are listed for the BMW B58 engine family, including the Toyota GR Supra B58 application.
Common B58-powered performance vehicles include:
- BMW M140i
- BMW M240i
- BMW 340i
- BMW 440i
- BMW 540i
- BMW Z4 M40i
- Toyota GR Supra 3.0L
Vehicle model alone does not guarantee compatibility. Different model years can use different B58 engine revisions, so confirm the manufacturer’s application and engine specifications before ordering.
For detailed vehicle information, refer to the Vehicle Fitment tab on this product page.
Benefits of Upgrading BMW B58 Main Bearings
Main bearings support the crankshaft and help maintain the oil film needed between the crankshaft journals and engine block.
During high-performance engine operation, they must withstand substantial mechanical loading while maintaining appropriate lubrication.
The King Racing MB7779XPC bearing set offers a combination of precision manufacturing, racing-grade bearing geometry and polymer-coated protection.
For engine builders assembling modified B58 engines, correctly selected racing bearings can form an important part of a dependable engine-internals package.
These bearings do not independently increase engine horsepower. Their purpose is to provide suitable crankshaft support and durability under the engine’s intended operating conditions.
Complete Your BMW B58 Engine Build
When building a high-performance BMW B58 or Toyota GR Supra engine, selecting compatible internal components is essential.
Depending on the intended application, your engine build may also require performance connecting rod bearings, forged connecting rods, upgraded pistons, gaskets, crankshaft components and suitable fasteners.
Explore more products and resources from Performance Car Parts UK:
- Shop Performance Car Parts UK – browse aftermarket engine components and vehicle upgrades.
- Performance Car Parts & Upgrades UK Guide – learn about performance components and choosing compatible upgrades.
- Best Car Mods for More Power – explore engine, cooling, intake and other modifications for performance vehicles.
These resources can help you plan a balanced performance build with appropriately matched components.
Why Choose Genuine King Racing Engine Bearings?
King Engine Bearings is an established manufacturer specialising in precision-engineered engine bearings for standard and high-performance applications.
Its racing bearing technologies are developed to address the demands of engine load, lubrication, wear and dimensional accuracy.
The MB7779XPC combines several King Racing technologies, including:
pMaxBlack™: Hardened racing bearing overlay for improved load capacity.
pMaxKote™: Nano-composite polymer coating for enhanced wear and seizure resistance.
Radialock™: Optimised bearing crush characteristics for secure installation and heat transfer.
Eccentrix™: Engineered bearing eccentricity intended to support hydrodynamic lubrication.
Bull’s Eye Tolerance™: Precision wall-thickness control for consistent bearing dimensions.
For manufacturer technical data and bearing size information, visit the official King Racing MB7779XPC product page.
You can also learn more about King Racing pMaxKote polymer-coated bearing technology.
Installation Recommendations
King Racing MB7779XPC bearings should be installed by an experienced engine builder or qualified technician.
Before installation:
- Confirm the exact BMW B58 engine application.
- Measure crankshaft main journal diameters.
- Check bearing housing dimensions.
- Select the correct bearing size.
- Measure assembled main bearing oil clearances.
- Check crankshaft condition and lubrication-system requirements.
- Follow the relevant manufacturer installation procedures and torque specifications.
Correct bearing selection and professional installation are essential for reliable engine operation.
Buy King Racing MB7779XPC Main Bearings in the UK
Looking for genuine King Racing MB7779XPC polymer coated main bearings for your BMW B58 or Toyota GR Supra?
Performance Car Parts UK supplies aftermarket engine components and performance upgrades for enthusiasts, workshops and engine builders.
Whether you’re rebuilding a modified BMW B58 engine or preparing a Toyota GR Supra for demanding performance use, the MB7779XPC offers advanced King Racing bearing technology designed for high-load applications.
Order your King Racing MB7779XPC main bearing set online at Performance Car Parts UK.
Select the correct bearing size before ordering and review the Technical Specification and Vehicle Fitment tabs for additional information.
Manufacturer: King Engine Bearings
SKU: MB7779XPC
Application: BMW B58 3.0L and supported Toyota GR Supra engines
Coating: pMaxKote™ Polymer Coated
Quantity: Seven-Pair Main Bearing Set
Professional engine measurements and fitment verification are required before installation.
