Reinforced Head Studs ARP M3 E36 E46 Z3M Z4M S50B30 S50B32 S54B32

This kit of reinforced ARP head studs for BMW M3 E36, M3 E46, Z3M and Z4M consists of 14 ARP studs, 14 ARP washers and 14 ARP nuts.

You will find the fitting instructions under the "Download" tab above.

Below (click on the image) you will find the reinforced head gaskets for the BMW S50B30 S50B32 engine:

Below you will find the link (click on the image) to the reinforced head gaskets compatible with your BMW S54B32 engine:

Coming from the aerospace industry, Gary Holzapfel founded the ARP (Automotive Racing Products) brand in the early 1970s to address a major issue in motorsport: engine failure caused by bolts and studs that were not strong enough. At the time, no manufacturer was able to meet this need. Today ARP offers thousands of references across different ranges and product types, such as head bolts, main bearing bolts and con rod bolts. Depending on the application, ARP offers different fastener material ranges:

• 8740: a chrome-moly steel with standard strength properties, entirely suitable for tuned engines. This steel offers a tensile strength of between 1240 and 1447 N/mm2.
• ARP2000: stronger than 8740, the ARP2000 alloy can withstand clamping/tensile loads of up to 1516 N/mm2. This range is frequently used on track and drag cars and can be used with hydrogen.
• L19: a higher-grade treated steel offering tensile and fatigue strength properties significantly higher than the 8740 and ARP2000 ranges. Its tensile strength can reach up to 1792 N/mm2. This material is more sensitive to corrosion and must therefore be kept oiled and not exposed to moisture. Using hydrogen with this range is not recommended.
• CA625+ (Custom Age 625 Plus): this "superalloy" has significantly superior technical properties while being resistant to corrosion and oxidation. Its tensile strength can reach up to 1930 N/mm2.

All ARP hardware is designed and manufactured in the United States. Manufacturing of ARP hardware begins with cold or hot forging, then a heat treatment (different depending on the range) is applied, followed by shot peening to remove irregularities. Precision grinding then follows to achieve perfect concentricity, before the thread is cut. Finally comes the finish, during which a coating is applied, such as black chrome-moly oxide or stainless steel polishing depending on the product range.

Each kit is supplied with assembly lubricant and instructions stating:

• Installation steps
• Thread of the bolts / studs / nuts
• Tightening torque
• Tightening procedure