ARP Main Stud Kit Subaru EJ257 turbo. 4-bolt main cap reinforcement for 500+ HP builds. Used in general machinery assembly, structural steelwork and pressure-boundary flanged joints per DIN, ISO and ASME B18 dimensional standards.
ARP Main Stud Kit Subaru EJ257 turbo. 4-bolt main cap reinforcement for 500+ HP builds. Used in general machinery assembly, structural steelwork and pressure-boundary flanged joints per DIN, ISO and ASME B18 dimensional standards.
| Material | ARP 2000 alloy |
| Standard | ARP |
| Thread | 10mm main + 8mm aux |
| Approval | ARP |
| Standards | ASTM A193, ASTM A194, ASTM A193 B7, ASTM A194 2H |
| HS code | 7318.15 |
| Material | ARP 2000 alloy |
| Primary standard | ARP |
| Thread standard | 10mm main + 8mm aux |
| MOQ | 1 |
ARP heat-treated fasteners have stretch-to-yield instruction sheet. Follow ARP lubricant + torque angle protocol for correct preload.