ARP BMW E46 M3/S54 12pt head stud kitVirtually every top professional BMW engine builder relies on ARP Pro Series head studs, particularly on the S54 3. 2 litre engine. ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is heat treated to 200,000 psi, ensuring complete heat penetration. ARP studs are threaded after heat treat, which gives them 1000% (that's ten times!) better fatigue strength than studs threaded prior to heat treat. Threading
Shopping security
Each payment you make on thelockerguy is secured with strict SSL encryption and PCI DSS data protection protocols