ARP Head Studs MINI Cooper S R53 1.6 16V W11B16A

This kit of reinforced cylinder head studs for the MINI Cooper R53 is made up of 10 ARP studs, 10 ARP washers and 10 ARP nuts.

The fitting instructions are in the "Download" tab above.

You will find the reinforced head gaskets for the MINI W11B16A engine below (click on the image):

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

• 8740 : a chrome-molybdenum steel whose standard strength properties are perfectly suited to prepared engines. This steel offers a tensile strength of between 1240 and 1447 N/mm².
• ARP2000 : stronger than 8740, the ARP2000 alloy withstands clamping and 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 well above the 8740 and ARP2000 ranges. Its tensile strength reaches up to 1792 N/mm². This material is more sensitive to corrosion and must therefore be kept oiled and away from moisture. Hydrogen is not recommended with this range.
• CA625+ (Custom Age 625 Plus) : this "super alloy" offers far higher technical properties while resisting corrosion and oxidation. Its tensile strength can reach 1930 N/mm².

All ARP fasteners are designed and manufactured in the United States. Production starts with cold or hot forging, then a heat treatment (which differs from one range to another) is applied and shot peening is carried out to remove irregularities. Precise grinding follows to obtain perfect concentricity, then the thread is produced. Finally comes the finish, where a coating is applied such as chrome-molybdenum black oxide or stainless steel polishing depending on the product range.

Every kit is supplied with an assembly lubricant and an instruction sheet stating:

• the installation steps
• the thread of the bolts, studs and nuts
• the tightening torque
• the tightening procedure