B58 Cylinder Head Service by 5150 AutoSport

5150 Autosport Pro-Xtreme Cylinder Head Service for BMW / Toyota B58 Engines

Please note that price is based on customer providing core. If you need help sourcing a core, please contact our sales team.

Maximize the performance of your B58 engine with 5150 AutoSport’s Pro-Xtreme Cylinder Head Service. Designed for high-horsepower builds, this service enhances airflow, combustion efficiency, and valvetrain stability for increased power and reliability.

Service Includes:

Comprehensive Inspection & Cleaning
Each cylinder head undergoes complete disassembly, crack and pressure testing, and thorough cleaning to remove contaminants, ensuring a solid foundation for performance upgrades.

Performance Valve Guides
Upgraded high-performance valve guides provide superior heat resistance, reduced friction, and precise valve alignment, minimizing valve float at high RPMs.

CNC Porting for Improved Airflow
CNC-machined intake and exhaust ports optimize flow, reducing turbulence and increasing efficiency for better throttle response and horsepower gains.

Multi-Angle CNC Valve Job
Precision-machined valve seats improve airflow transition, enhancing volumetric efficiency on the intake side and reducing exhaust backpressure for improved power delivery.

Valve Unshrouding
Machining around the valve seats increases airflow capacity, optimizing combustion chamber efficiency for better performance.

Chamfering in Key Areas
Beveled edges on ports and valve seats reduce stress concentrations, preventing cracks and improving durability.

Surface Resurfacing & Trueness Checking
Ensures a perfectly flat mating surface for a reliable head gasket seal, eliminating warping and irregularities.

Final Wash & Assembly
After machining, the cylinder head is cleaned to remove debris before reassembly with high-performance valves, balanced valve springs, and upgraded retainers for precise, long-lasting valvetrain operation.

This fully assembled, high-performance cylinder head is ready for installation and timing by an experienced engine builder. Built for demanding applications, it delivers increased power, improved reliability, and superior efficiency for your B58 engine.

BMW B58 Gen 1 Applications:

1 Series

2016-2019     F20/F21     M140i

2 Series

2016-2019     F22/F23     M240i

3 Series

2015-2019     F30/F31     340i / 340i xDrive
2016-2019     F34     340i GT / 340i GT xDrive

4 Series

2016-2020     F32/F33/F36     440i / 440i xDrive

5 Series

2016-2019     G30/G31     540i / 540i xDrive

6 Series

2017-2019     G32     640i GT / 640i GT xDrive

7 Series

2015-2019     G11/G12     740i / 740i xDrive

X3 Series

2017-2019     G01     X3 M40i

X4 Series

2018-2019     G02     X4 M40i

BMW B58 Gen 2 Applications:

2 Series

2022-Present     G43     M240i / M240i xDrive

3 Series

2019-Present     G20/G21     M340i / M340i xDrive

4 Series

2020-Present     G22/G23/G26     M440i / M440i xDrive

Z Series

2019-Present     G29     Z4 M40i

5 Series

2020-Present     G30/G31 LCI     540i / 540i xDrive

6 Series

2020-Present     G32 LCI     640i GT / GT 640i xDrive 

7 Series

2019-Present     G11/G12 LCI     740i / 740i xDrive

X3 Series

2020-Present     G01     X3 M40i

X4 Series

2020-Present     G02     X4 M40i

X5 Series

2018-Present     G05     X5 xDrive40i

X6 Series

2019-Present     G06     X6 xDrive40i

X7 Series

2018-Present     G07     X7 xDrive40i

ALPINA B58 Gen 2 Applications:

B3 Series

2020-Present     G20/G21     B3

B4 Series

2022-Present     G22     B4

B5 Series

2020-Present     G30     B5

XB7 Series

2020-Present     G07     XB7

Toyota B58 Gen 2 Applications:

A90 / A91 Supra

2020-Present     GR Supra 3.0    
2020-Present     GR Supra 3.0 Premium    
2021-Present     GR Supra 3.0 A91 Edition