- Jinpao Precision Company Limited
- KG Lertphan Company Limited
- Asian Unity Parts Company Limited
- Thai Switchboard and Metal Work Company Limited
- Summit Auto Body Industry Company Limited
- Summit Laem Chabang Auto Body Works Company Limited
- KPN Sakaguchi Company Limited
- CH Auto Parts ,Ltd
- GPX Motor(Thailand) Co.,Ltd
- Sanki Quality Products Co.,Ltd
- Sangrompo Autopart Co.,Ltd
- Thai Radiator MFG Co.,Ltd
- Thai Yoshimoto Coating Co.,Ltd
- PC Takachima Co.,Ltd
- SIAM DAISO INDUSTRIES CO., LTD.
- etc
