[FED 387]

OK guys not sure what if any performance advantage if there is one but the BIG 3 have been installing aluminum driveshafts in rear wheel drive vehicles from Camaros to Lincolns to full size pick ups/vans etc for about 20 years---there must be a reason they are doing it--anybody wanna guess why a multi billion dollar company would do it?? It aint the color of silver vs. black or rust so why do ya think they are doing it????? comp 387