K&N only has a few races at Cup tracks anyway, so I don't get why they mentioned that series
Because K&N is beginning to run at Cup and Nationwide tracks more often. Every year, another short track disappears and another big track appears. Fair, valid observation from Mike and Jaws.
Forgive my ignorance, where did Nationwide/Truck/K&N use to race? I'm assuming by the responses, not the same tracks as the Cup series?