1. Aisin Corporation
2. Art Metal Mfg. Ltd.
3. Atrac Engineering Company
4. Capricorn Automotive Ltd.
5. Continental AG
6. CP-Carrillo
7. Diamond Racing Pistons
8. Egge Machine Company
9. Gibtec Pistons
10. Hastings Manufacturing Company
11. Hi-Standard Machining Company
12. Hitachi
Ltd.
13. Honda Foundry (Asian) Co. Ltd.
14. Indian Piston Limited
15. ItalianRP
16. Magna International Inc.
17. Mahle GmbH
18. Maxiforce Inc.
19. Piston Group
20. RaceTec Pistons
21. Rheinmetall AG
22. Riken Corporation
23. Ross Racing Piston
24. Shriram Piston & Rings Ltd.
25. Tenneco Inc.
26. Wossner Pistons