ARP Head Stud Kit, BMW / Toyota B58

This ARP2000 Head Stud Kit 203-4705 is designed for the turbocharged inline 6-cylinder B58 engines found in varias BMW chassis and the Toyota GR Supra A90/A91.  As you increase the power output of your engine beyond its factory specifications, the head and block may start to separate, causing factory bolts to stretch and fail. ARP Head Studs are stronger than factory bolts, ensuring your race engine stays together even under extreme conditions.  The Custom Age 625+ option 203-4706 is made from ARP's 625+ material that has a tensile strength of 260 ksi, substantially higher than the 190 ksi of the ARP 2000 head stud. It's an ideal choice for individuals who want to push the limits of their B58 builds and require a stronger head stud. Our Oversized Kit option utilizes ARP's proprietary Custom Age 625+ material option combined with specialized insert washers for ultra-high boost applications. Please note that this kit requires that the cylinder head be clearanced and the engine block to