Description
The ARP 201-4703 head stud kit is listed for BMW S63 U/C - Natural Finish. The fasteners secure the cylinder head to the block; their application, installed length and preload must work with the chosen head and gasket arrangement.
Technical Highlights
- Manufacturer part number: 201-4703
- Application/configuration: BMW S63 U/C - Natural Finish
- Specified configuration: 12-Point
- Material: Custom Age 625+
Custom Age 625+ combines high strength and fatigue resistance with resistance to atmospheric corrosion and oxidation. It is a material specification, rather than a guaranteed power or boost rating for the assembled engine.
Selection Guidance
Fastener preload supplies the clamping force at the head-to-block joint. Gasket sealing also depends on suitable deck finish, component condition and the correct assembly procedure.
Match the engine and any specified aftermarket cylinder heads or block to the listed configuration. Do not assume that related engines use the same fastener dimensions. Pay particular attention to the stated 12-Point configuration.
Installation Considerations
Check block threads, fastener engagement and cylinder-head clearance during trial assembly. Follow the instructions for this exact part number, including lubricant locations, washer orientation and tightening sequence. Washer seating and lubrication requirements vary by kit.