| Business | Phone |
| Exotic Auto Sound & Motorsport 7301 Westminster Blvd, Westminster 92683 | (714) 379-5600 |
| 714 Motorsports 7100 Hazard Ave, Westminster 92683 | (714) 901-0714 |
| A-Plus Auto Sound Westminster 92683 | (714) 895-5583 |
| Auto Sound Specialist 13749 Beach Blvd, Westminster 92683 | (714) 891-8779 |