N63 Cylinder Head Service by 5150 AutoSport

5150 AutoSport Performance Cylinder Head Services for BMW N63 Engines

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

Investing in a performance cylinder head service is crucial for optimizing engine potential in performance builds. We offer three levels of service to meet your budget and build goals, from OEM refresh to full race-level machining:

Stage 1 – OEM Refresh (Rebuild & Reliability Focused)

Ideal for stock or mildly modified engines needing a proper refresh.

The cylinder head is fully disassembled, cleaned, and soda blasted to remove carbon and contaminants. Valve guides are measured and inspected, with new guides installed if needed, then precision reamed and honed for proper clearance. A 5-angle valve job is performed to restore sealing efficiency, followed by resurfacing to ensure a flat, true mating surface. New Viton valve seals are installed, the head is fully reassembled using OEM valves, guides, springs, and retainers, and pressure tested after assembly.
Optional upgrade: add a high-performance valve spring kit.

Stage 1 at a Glance: 

• Disassemble and Clean
• Soda Blast
• Inspect and Measure Valve Guides
  • Removal and Installation of new Guides, if necessary
• Ream and Hone Valve Guides
• 5-Angle Valve Job
• Resurfacing
• Final Wash
• Install New Viton Valve Seals
• Setting of Seat Pressure
• Full Reassembly
• Pressure Testing after assembly

Stage 2 – Performance Valvetrain Upgrade

For higher RPM builds and increased durability.

Includes everything from Stage 1, plus upgraded high-performance valves, a high-performance valve spring kit, and new valve locks/keepers. This stage improves valvetrain stability, reduces the risk of valve float, and prepares the head for more aggressive use while retaining OEM-style machining processes.

Stage 2 at a Glance: 

• Disassemble and Clean
• Soda Blast
  
• Removal of OEM Valve Guides
• Installation of Performance Valve Guides
• Ream and Hone Valve Guides
• 5-Angle Valve Job
• Resurfacing
• Final Wash
• Install New Viton Valve Seals
• Install New High Performance Valve Spring Kit
• Install New High Performance Valve Kit
• Install New High Performance Valve Keepers
• Setting of Seat Pressure
• Full Reassembly
• Pressure Testing after assembly

Pro-Xtreme – All-Out Performance Cylinder Head Service

Designed for high-horsepower, forced-induction, and competition builds.

The cylinder head undergoes complete disassembly, cleaning, and in-depth inspection, including crack, leak, and pressure testing. Factory valve guides are replaced with high-performance guides, then precision reamed and honed for extreme heat and RPM stability. 

CNC multi-angle porting is performed on both intake and exhaust ports to improve airflow consistency across all cylinders. A CNC multi-angle intake valve job and radius exhaust valve job optimize flow into and out of the combustion chamber. Valves are unshrouded to further enhance airflow, and preventative chamfering is applied in critical areas to reduce stress concentrations.

The mating surface is trueness checked, resurfaced, and verified again for perfect sealing. After machining, the head is thoroughly washed and assembled using balanced and blueprint-matched high-performance valves, along with balanced valve springs and retainers for precise valve control and long-term durability.

Pro-Xtreme at a Glance: 

• Disassemble and Clean
• Soda Blast
  
• Removal of OEM Valve Guides
• Installation of Performance Valve Guides
• Ream and Hone Valve Guides
• 5-Axis CNC Intake Porting
• 5-Axis CNC Exhaust Porting
• CNC Combustion Chamber Modification
• 5-Angle CNC Intake Valve Job
• 5-Angle CNC Exhaust Valve Job
  
• Unshrouding of Valves
• Preventative Chamfering in Potential Problem Areas
• Trueness Checking of Mating Surface
• Resurfacing
• Final Wash
• Install New Viton Valve Seals
  
• Install New High Performance Valve Spring Kit
• Install New High Performance Valve Kit
• Install New High Performance Valve Keepers
• Setting of Seat Pressure
• Full Reassembly
• Pressure Testing after Assembly

Read more about our Pro-Xtreme service here. 

BMW N63 Applications:

BMW 5 Series

2010–2017     BMW F07      550i
2011–2016     BMW F10      550i
2017–Present     BMW G30      M550i xDrive

BMW 6 Series

2012–2018     BMW F06     650i
2012–2018     BMW F12     650i    
2012–2018     BMW F13     650i

BMW 7 Series

2009–2015     BMW F01/F02     750i/750Li
2015–Present      BMW G11/G12     750i/750Li
2017–Present     BMW G12     M750Li xDrive

BMW 8 Series

2018–Present     BMW G14     M850i xDrive
2018–Present     BMW G15     M850i xDrive
2018–Present     BMW G16     M850i xDrive

BMW X5 Series

2010–2013     BMW E70     X5 xDrive50i
2014–2018     BMW F15     X5 xDrive50i
2019–2023     BMW G05     X5 M50i

BMW X6 Series

2010–2014     BMW E71     X6 xDrive50i
2015–2019     BMW F16     X6 xDrive50i
2019–2023     BMW G06     X6 M50i

BMW X7 Series

2018–2019     BMW G07     X7 xDrive50i
2019–2022     BMW G07     X7 M50i

Alpina B5 Series

2011–2016     BMW F10 Alpina     B5 Bi-Turbo
2017–Present     BMW G30 Alpina     B5 Bi-Turbo

Alpina B6 Series

2012–2018     BMW F06/F12/F13 Alpina     B6 Bi-Turbo

Alpina B7 Series

2010–2015     BMW F01 Alpina     B7 Bi-Turbo
2015–2019     BMW G12 Alpina     B7 Bi-Turbo

Alpina XB7 Series

2020–2022     BMW G07 Alpina     XB7