| Business | Phone |
| Charley's Cylinder Heads 3449 Sw 29th St, Oklahoma City 73119 | (405) 688-8110 |
| Cylinder Head Specialists 212 S Alliance Ct, Oklahoma City 73128 | (405) 495-7024 |
| Don Wise Machine Shop 6349 Melrose Ln, Oklahoma City 73127 | (405) 495-2376 |
| Jackson Auto Parts & Machine 510 W Britton Rd, Oklahoma City 73114 | (405) 848-6653 |
| Mike's Machine Shop 5904 S Ivanhoe St, Oklahoma City 73129 | (405) 631-7305 |
| Simon & Sons' Auto Repair Shp 2812 Ne 23rd St, Oklahoma City 73121 | (405) 424-1594 |
| Sims Automotive Inc 1628 Nw 6th St, Oklahoma City 73106 | (405) 235-1621 |