Sivan Design Group, also known as C1 Design Group, is an Iranian car design firm and product development company in Tehran, Iran.
Founded in 2006[1] by Alireza Mohammadzadeh & Mohammad Hossein Amini Yekta.
SIVAN Group has grown from a two-person design and engineering company to a product development firm.
First contest held from 24 April to 24 September 2009 and the first collective concept car design exhibition titled "From Dream to Reality" took place from 18 to 23 April 2009 at the Kamal Aldin Behzad Gallery in Teheran, Iran.
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