ARP Head Stud kit Custom Age 625+, BMW B58 / S58

ARP CA625+ head stud kit for BMW B58 and S58 high power builds

The ARP CA625+ head stud kit is designed for BMW B58 and S58 engines running well beyond stock power levels. As boost and cylinder pressures increase, a reliable and extremely strong clamping solution becomes critical.

CA625+ is ARP’s top-tier material, used in the most demanding racing and high performance applications. It offers significantly higher tensile strength and fatigue resistance compared to standard ARP 2000 kits, making it the right choice for very high horsepower builds and extreme operating conditions.

The head stud design provides more consistent and accurate clamping force compared to factory torque-to-yield bolts. This helps maintain head gasket sealing even under extreme load and high cylinder pressure situations.

• ARP CA625+ premium material
• Designed for very high horsepower and cylinder pressures
• Ideal upgrade for tuned B58 and S58 engines
• Improves head gasket sealing under extreme conditions
• More consistent clamping with stud design
• Suitable for racing and high-end engine builds

Part number: ARP 401-4701

Example compatible models:

BMW 140i 2016-2019
BMW 240i 2016-2021
BMW 340i 2016-2019
BMW 440i 2016-2020
BMW Z4 2019-
Toyota Supra 2019-
BMW M2 2023-
BMW M3 2021-
BMW M4 2021-

Note: Recommended to be used with a high quality head gasket.