Cylinder Head Studs for BMW 2.5L (M50), 3.0L (S50US) & 3.2L (S52US) inline 6 ARP2000 12-pt Nuts

Cylinder Head Studs for BMW 2.5L (M50), 3.0L (S50US) & 3.2L (S52US) inline 6 ARP2000 12-pt NutsIt is for good reason that virtually every top professional enginebuilder relies on ARP Pro Series head studs for their all out competitionpowerplants. Simply stated, theres not a better stud setupon the market today. For openers, ARP only uses premium grade 8740 alloy anda proprietary ARP2000 alloy that are rated far superior to aircraftquality alloy steels. Secondly, each stud is placed verticallyinto special racks and precisely heat treated to

ARP Pro Series head bolt kits are application specific and designed to deliversuperior strength typically associated with competition engines

ARP’s special drive plate bolts have many important features

ARP offers High Performance Series bolts that aremade from a premium grade chrome moly and hardened to a nominal tensile strength of 180

Available in black oxide finish 8740 chrome moly or polished stainless steel with hex or 12-point nuts

We highly recommend using a stretch gauge when installingrod bolts and other fasteners where it is possible to measure thelength of the bolt after tightening

all ARP main bolts feature a reduced renching head

thread pitch to thread pitch

Cycle testing hows ARP High Performance rod bolts to be nearly five times more reliable than stock bolts

as well as hex or 12-point heads

the shaft diameter is a larger diameter than the OEM unit

This material is easily contaminated and subject to stress corrosion

Finish 2: Polished