ARP BMW E46 M3/S54 12pt head stud kit Heat prevention The threaded damper body is

The threaded damper body is plated with a new age “Black Chromium”

The thermoplastic material provides protection against extreme surface temperatures

Product Line: ARP Balancer Bolt Kits

forces Air directly into core of intercooler

and rebuildable with a stronger spring should you increase the boost pressure with a remap

ARP BMW E46 M3/S54 12pt head stud kit Heat prevention The threaded damper body isVirtually 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