2.5L 24v - M54B25
Manufacturers
2.5L 24v - M54B25

Set of 6 forged 4340 steel connecting rods for BMW 2.5L 24V M54B25.Brands: ZRP Compatibility: 325i (E46), 525i (E39/E60), X3 2.5i, Z4 Engine codes: M54B25 Bolts included: ARP 2000 or ARP L19
Single forged connecting rod in 4340 steel for BMW M54B25.Brand: ZRP Compatibility: BMW 325, M54B25 Engine codes: M54B25 Bolts included: ARP 2000
Set of 12 trimetal connecting rod half-bearings for BMW inline-six M20, M50, M52 and M54.Brands and treatments: ACL Race and King Racing (optional pMaxKote coating) Compatibility: E30, E34, E36, E39, E46, E60, Z3, Z4 Engine codes: M20, M50, M52, M54, S50B30US, S52B32US Available sizes: standard to +0.50 mm, increased-clearance versions (HX / STDX)
The M54B25 is BMW's 2.5 litre 24-valve straight six, fitted to the 325 among others.
This category covers the bottom end of the build. The forged connecting rods made for this engine come as a full set or as a single rod, so one damaged rod can be replaced without buying the whole set again. They are designed to take forged pistons and to cope with the extra revs and cylinder pressure of a tuned engine.
Alongside them, tri-metal big end bearings, shared across the BMW M20, M50, M52 and M54 straight sixes, complete the rotating assembly.