| Conversion Shop | Contact |
| Clean Air Concepts Inc. | 2614 Tuliptree Lane Dyer, IN 46311 219-746-4852 |
| Cummins Westport (B-LPG Plus Heavy Duty Engine) |
Cummins Engine Co. 1900 McKinley Avenue Columbus, IN 47201 |
| Jasper Alternative Fuels | 815 Wernsing Road Jasper, IN 47547 800-827-7455 ext. 2027 812-634-1820 (fax) |
| Schroeder Sales & Service, Inc. | 1001 West Park Drive Huntington, IN 46750 260-356-0397 |
