NASCAR driver Denny Hamlin has revealed that the Xfinity and Craftsman Truck Series could undergo major changes by 2028, aligning with the Cup Series in terms of having single-source suppliers.

Currently, all parts for the Cup Series cars come from single-source suppliers, making them spec cars. Now, Hamlin has stated that cars from the Xfinity and Truck Series could become spec cars.

The practice of having spec cars ensures equality in competition across all teams. While Hamlin stressed that it is a rumor, the probability of it happening is high. He said on his Actions Detrimental podcast :

"From what I'm hearing, in the Truck Series, NASCAR's telling them — this is what I've been told, this is a rumor; I don't know if this is factual, but it's a rumor — that they need them to go

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