MotorsportdeSport Tahririyati 78
NASKAR's Current OEMs Stick with Internal Combustion Engine Power
NASKAR's current OEMs continue to use internal combustion engine power, at least for now.

NASKAR's identity is currently tied to internal combustion engines, which are loud and associated with the majority of American consumers.
While the sanctioning body is working on developing a prototype race car that can adapt to any alternative fuel or power source, all four manufacturers participating in the three national tours are satisfied with internal combustion engine power.
Source:Motorsport.com