ARP Head Studs are stronger than factory bolts

precision-machined to support aftermarket injectors and ensure balanced fuel distribution across all six cylinders

Trusted by professionals and enthusiasts alike

Sequential Injection – Supports up to 2 rotors or 4 cylinders

ATI Billet Aluminum E-Clutch Hub Toyota / BMW ZF 8HP51 M240i ARP Head Studs are strongerATI's billet aluminum E Clutch Hub fits 5th Gen Toyota Supras and BMW vehicles equipped with ZF 8HP51 automatic transmissions. This new ATI part # 711014 is a direct replacement for the OEM Part # ZF 1101 471 029. The OEM hub, crafted from A380 aluminum, is easily cast and machined but tends to fail in performance and high mileage scenarios. Its most common issue is splines wearing or shearing off, leading to steel clutch plates digging in and causing