- Tata Motors - Pune.
- Tata - Motors - Jamshedpur.
- Ashok Leyland.
- Cummins - India.
- Mahindra & Mahindra Ltd.
- Tata Cummins.
- Autotech Industries.
- Greaves Ltd.
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- Bajaj Tempo Limited (Force Motors).
- Southern Auto Ltd.
- Kirloskar Oil Engines.
- TVS Autolec (Sundaram).
- G. P. Enterprise.
- Unique Auto.
- Kar Mobile.
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