| Business | Phone |
| Comac Manufacturing Corp 2785 Feather River Blvd # A, Oroville 95965 | (530) 534-7220 |
| Diversified Products Manufacturer Inc 5523 Baggett Marysville Rd, Oroville 95965 | (530) 534-3966 |
| F & M Machine & Manufacturer Co 2680 5th Ave # A, Oroville 95965 | (530) 533-8440 |
| Norca Precision Machining 5625 Baggett Marysville Rd, Oroville 95965 | (530) 534-6872 |
| Performance Products Inc 2730 Feather River Blvd, Oroville 95965 | (530) 532-3331 |
| Apex Automotive Machine Shop 2680 5th Ave # C, Oroville 95965 | (530) 533-4107 |
| B & S Machine 57 Harmony Dr, Oroville 95966 | (530) 589-5040 |
| Buffalo Machine & Engineering 13427 Trillium Ln, Oroville 95965 | (530) 533-6646 |
| Cal Tech Machining 2922 Lone Tree Rd, Oroville 95965 | (530) 846-4888 |
| Cando Specialties 4481 Lincoln Blvd, Oroville 95966 | (530) 533-8680 |
| Central Valley Grinding 5523 Baggett Marysville Rd, Oroville 95965 | (530) 534-8396 |
| Don Johnson Racing 1687 Grand Ave, Oroville 95965 | (530) 534-0695 |
| Wright Precision 2575 5th Ave, Oroville 95965 | (530) 533-2261 |