A CNC-machined forged piston and connecting rod set for the BMW M54B30 naturally-aspirated inline-6, built from 4032 forged aluminum pistons (heat resistant, low expansion) paired with 4340 aircraft-quality steel H-beam connecting rods that are magnaflux and X-ray tested. This listing is the 84.5mm oversize version, intended for a rebuild where the cylinder bore has been machined 0.5mm over the factory 84.0mm diameter.

Fitment: BMW 3 and 5 Series and Z3 models (chassis E46, E39, E85) fitted with the M54B30 engine, 84.5mm oversize.