| Business | Phone |
| Magna International Of America 600 Wilshire Dr, Troy 48084 | (248) 729-2400 |
| Intertec Systems 2600 Bellingham Dr, Troy 48083 | (248) 743-6500 |
| Kautex North America 750 Stephenson Hwy, Troy 48083 | (248) 616-5100 |
| L D Industries 1780 Thunderbird, Troy 48084 | (248) 362-5240 |
| Vehma International Engnrng 1807 E Maple Rd, Troy 48083 | (248) 689-5512 |
| Arvin Meritor Automotive Inc 894 Maplelawn Dr, Troy 48084 | (248) 614-9057 |
| Arvin Meritor Inc 2135 W Maple Rd, Troy 48084 | (248) 435-1000 |
| Teleflex Automotive Group Inc 700 Stephenson Hwy, Troy 48083 | (248) 616-3800 |
| Bell Automotive 3250 W Big Beaver Rd, Troy 48084 | (248) 643-4466 |
| Sachs Automotive Of America 2107 Crooks Rd, Troy 48084 | (248) 458-3600 |
| Custom Accessories Midwest Inc 77 E Long Lake Rd, Troy 48085 | (248) 828-2760 |
| Delphi Corp 5725 Delphi Dr, Troy 48098 | (248) 813-2000 |
| Delphi Diesel 1624 Meijer Dr, Troy 48084 | (248) 288-2000 |
| Delphi Thermal & Interior 1401 Crooks Rd, Troy 48084 | (248) 655-0700 |
| Donaldson Automotive Group 4967 Crooks Rd, Troy 48098 | (248) 312-0260 |
| Michigan Brake Manufacturer 2718 Industrial Row Dr, Troy 48084 | (248) 435-2250 |