Aluminum Thermostat Housing: New
Most E36 3 Series and E34 5 Series cars equipped with M50 motors have plastic thermostat housings. Over time, the constant heating and cooling can cause the plastic housings to weaken and break. Don't get stranded! Replace your plastic housing with our quality aluminum piece. E36 1998-99 323is, 1992-95 325i, 1992-95 325is, 1996-98 328i, 1996-99 328is, 1995-99 M3, 1994-95 325i Conv., 1998-99 323i Conv., 1996-99 328i Conv., 1998-1999 M3 Conv.
E34 1991-95 525i, 1992-95 525it

Hmmh, I hope one day they will make an integrated alu radiator with electric fan too.