| Business | Phone |
| A & A Engine Installers Inc 3365 Refugee Rd, Columbus 43232 | (614) 235-3985 |
| Randy's Automotive Machine 4029 E Main St # D, Columbus 43213 | (614) 235-9970 |
| Performance Research Inc 3328 Westerville Rd, Columbus 43224 | (614) 475-8300 |
| Fowler Engines Inc 3021 Switzer Ave, Columbus 43219 | (614) 258-2924 |