2.5 TFSI EA855 stud bolt cylinder head ARP

ARP stud kit cylinder head for all 2.5L TFSI engines as installed in Audi TTRS and Audi RS3. A MUST for all engines that drive with increased charge pressure! ARP is the market leader in this field. The stud bolt are made of 8740 chromoly steel and have rounded threads. Up to 30% stronger expansion steel than stock bolts. 100% reusable. Now also available as BAR-TEK High-Boost version! Recommended from 2 Bar charge pressure. ARP Kit includes 12 stud bolt with matching nuts and ARP Moly Paste. Tightening torque in three stages. Last stage 115 Nm. The stud bolt require a 12mm inner variety nut. The High Boost variant 16mm.