The top-level series currently has three manufacturers in Ford, Chevrolet and Toyota.
It last had four manufacturers in 2012, Dodge's final season before it pulled out of NASCAR.
Other manufacturers, including Nissan, which has a sizable presence in the American automobile market, have been linked to the series.
NASCAR president Steve Phelps said there is a "ton of interest" in the paddock in adding new manufacturers.
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https://www.motorsport.com/nascar-cup/news/nascar-finding-fourth-cup-manufacturer/4306982/?er=1
