1. AP Emissions Technologies
2. Benteler International AG
3. Borla Performance Industries Inc.
4. Bosal International
5. Car-Mon Products Inc.
6. Continental AG
7. Corsa Performance by Race Winning Brands Inc.
8. Cummins Inc.
9. Ebersp?cher Gruppe GmbH & Co. KG
10. Faurecia SE by Forvia Group
11. Fennosteel Oy
12. Friedrich Boysen GmbH & Co. KG
13. Futaba Industrial Co. Ltd.
14. Gibson Performance Exhaust
15. Hirotec Corporation
16. Holley Inc.
17. Klarius Products Ltd.
18. MagnaFlow
19. Marelli Holdings Co. Ltd.
20. MBRP Ltd.
21. REMUS Innovation GmbH
22. Sango Co. Ltd.
23. Sejong Industrial Co. Ltd.
24. Sharda Motor Industries Ltd.
25. Tenneco Inc.
26. Witzenmann GmbH
27. Yutaka Giken Co. Ltd.