No more drilling valve covers and installing crankcase vent fittings

Both cores measure in at 1

Carrillo Pro-Xtreme Rods

Cerametallic disc pack

Constructed from mandrel-bent T304 stainless steel

ARP Hardware Pack for BMW S58 Head Stud Kit:Custom Age 625+ No more drilling valve coversBMW S58 Complete ARP Engine Hardware Package All In One Strength for High Power Builds Upgrade your entire bottom and top end with the BMW S58 Complete Engine Hardware Package by 5150 AutoSport, featuring 100% genuine ARP components. This all inclusive kit is specifically designed for the BMW S58 engine found in models like the G80 M3, G82 G83 M4, X3M F97, and X4M F98. As your S58 build pushes past factory power limits, OEM torque to yield hardware