| 1 | Richland Ltd. | | USA |
| 2 | Combustion Technologies Inc. | | USA |
| 3 | MTC Engineering Inc. | | USA |
| 4 | L.A.Sleeve Co. | | USA |
| 5 | Dave Mackie Engineering | | USA |
| 6 | Cummins Aerospace | | USA |
| 7 | J.E. Pistons Inc. | | USA |
| 8 | Bon Exports | | USA |
| 9 | Arias Pistons | | USA |
| 10 | Perdeaux KC Inc. | | USA |
| 11 | Miller Industrial Products | | USA |
| 12 | Wiseco Piston Inc. | | USA |
| 13 | Southern Air Service | | USA |
| 14 | Greg-Co Piston Ring Inc. | | USA |
| 15 | Ace Grinding Machine Co. | | USA |
| 16 | Maxiforce Inc. | | USA |
| 17 | Cosworth | | USA |
| 18 | Aisin World Corp. of America | | USA |
| 19 | Hastings Manufacturing Company LLC | | USA |
| 20 | Elgin Industries | | USA |
| 21 | Esco Industries Inc. | | USA |
| 22 | MaxSil Pistons | | USA |
| 23 | Egge Machine Company Inc. | | USA |
| 24 | Aluminum Precision Products | | USA |
| 25 | Tmeyer | | USA |
| 26 | Diesel Parts of America | | USA |
| 27 | Cummins Inc. | | USA |
| 28 | Guaranteed Power International | | USA |
| 29 | Porite USA | | USA |
| 30 | Topline Automotive Engineering Inc. | | USA |
| 31 | Endyn Ltd. | | USA |
| 32 | Jaycraft Corp. | | USA |
| 33 | United Engine & Machine Co. | | USA |
| 34 | Venolia | | USA |
| 35 | United Wells | | USA |
| 36 | Supertech Performance Inc. | | USA |
| 37 | Arrow Engine Company | | USA |
| 38 | COMP Cams | | USA |
| 39 | Nebraska Machine Products Inc. | | USA |
| 40 | Lycoming Engines | | USA |
