NASCAR Seri Xfinity (sadurungé NASCAR Busch Series lan NASCAR Nationwide Series) minangka seri balap mobil stok sing dilakokno dening National Association of Stock Car Auto Racing. Xfinity Series Race (jeneng saka sponsor Xfinity) minangka balapan divisi kapindho ing seri NASCAR, sing tujuane kanggo ngembangake lan ngembangake pembalap enom menyang seri paling bergengsi, NASCAR Cup Series.

Lomba Seri Xfinity biasane dianakake sedina sadurunge lomba Seri Piala dianakake. Kadhangkala balapan kasebut ditindakake ing sirkuit sing beda karo sirkuit sing digunakake ing Seri Piala.

Pranala njaba 

 Situs resmi Seri Xfinity 
NASCAR