| Business | Phone |
| Baca's Racing Engines & Mach 1690 Mission Rd, San Francisco 94080 | (650) 756-0818 |
| Sunset Machine Shop 1160 San Mateo Ave, San Francisco 94080 | (415) 731-2405 |
| Lonnie Jensen Co 1350 25th St # B, San Francisco 94107 | (415) 695-0345 |
| Rpm Machine Shop 539 Faxon Ave, San Francisco 94112 | (415) 334-1369 |