Slightly off topic... I was perusing the bmwusa specs for 328i, and I came across this nugget:
Double-pivot type front suspension with dual forged-aluminum lower arms (328i xDrive and 335i xDrive have steel lower arms and a steel subframe, plus an aluminum thrust plate) 5-link rear suspension with cast-aluminum upper transverse arms
This looks like a misprint to me, anyone know what BMW's talking about?
2007 328i ZSP. M3 suspension
: custom valved Bilstein shocks, Hyperco race springs, M3 lower control arms front and rear, M3 sway bars, and M3 subframe bushings. E46 front guide supports. Euro tail lights.