The ARP head studs 201-4601 are made from premium-grade 8740 chromoly steel

they are capable of managing high horsepower forced induction engines that can produce up to 900HP

During the measuring process

74mm CEA compressor wheel mated to their 80mm high flow turbine wheel

and ensures smooth engine operation

OS Giken SuperLock LSD, BMW E34 M5 MarkIII The ARP head studs 201-4601Upgrade the performance and drivability of your BMW E34 M5 with the OS Giken SuperLock Limited Slip Differential. Engineered for both street and track use, this LSD features OS Gikens patented pressure ring and spline through side gear design, allowing for nearly double the number of friction plates compared to standard LSDs. The result is smooth, progressive lock engagement with unmatched reliability. Key Features: Patented pressure ring for