The ARP Rod Bolt Kit is part of the ARP Pro Series of premium-quality products, these being made specifically for the M50 24 valve straight 6 cylinder engine as used in 1992, 1993, 1994 and 1995 model E36 325i / 325is / 325ic, as well as the later 1992-1995 525i sedan and 525iT wagon (which came with the 24 valve engine). This bolt replaces BMW part #11241713342 and measures 53mm. Some later M50 engines may have a shorter 44mm bolt (ARP #201-6201, same as S52).
These connecting rod bolts are precision CNC-machined to ARP's exacting specifications and designed for optimum reliability on the 2.5 liter M50.
ARP rod bolts are thread rolled after heat treating, which gives them ten times better fatigue strength than those studs that are threaded prior to heat treatment (a very common industry practice). It costs more to do it this way, because it's tough on tooling, but the results are well worth the extra effort.
ARP Pro Series rod bolts are far superior to standard OEM fasteners in terms of durability, and they're fully capable of handling the extra stress of high-combustion engines.
BMW Fitments:
3 Series
E36 (92-99) > 325i
E36 (92-99) > 325ic
E36 (92-99) > 325is
5 Series
E34 (89-95) > 525i M50