-100% maintenance free operation

AND PMU CONFIGURATION

maximizing surface area to effectively reduce heat in your high-revving S85 V10 engine

BMW Z4 Series

As motorsports teams and race enthusiasts push the S58 beyond 800 horsepower

S58 CNC Cylinder Head Stud Conversion ARP-HSK -100% maintenance free operationCNC Cylinder Head Stud Conversion If youre building a S58 engine thats going to see 1200HP+, the way your head studs are set up is critical. We CNC machine cylinder heads to properly convert them for larger head studs, making sure everything is aligned, consistent, and accurately positioned. This isnt a quick drill job or a close enough fitment. Its done on a CNC machine so the geometry is exactly where it needs to be every time. Some shops will