| Diesel Exhaust Removal Systems |
| General Resource Corp. | http://www.generalresourcecorp.com |
| Engine Exhaust Systems |
| G.T. Exhaust Systems, Inc. | http://www.gteind.com |
| Engine Exhaust Systems |
| J. L. Industries | http://www.jlindustries.com |
| Filters |
| Ward Diesel Filter Systems | http://www.warddiesel.com |
| Vehicle Exhaust Removal Systems |
| Nederman, Inc. | http//www.nederman.com/
|
| Vehicle Exhaust Removal Systems | Vehicle Mounted | Ward Diesel Filter Systems | http://www.warddiesel.com |
| Vehicle Exhaust Systems |
| Arvinmeritor, Inc. | http://www.arvinmeritor.com |
| Vehicle Exhaust Systems | Emission Reduction | G.T. Exhaust Systems, Inc. | http://www.gteind.com |