If I recall correctly, these were a Walmart exclusive from a few years ago, "Zhengyang L" found these in Bulington (former Burlington Coats) as they are an overstock/outlet chain ... they are left over from 2021/2022.
For the past 4-5 years, wed have had a NASCAR CARS collab with real NASCAR drivers with "CARS" character names in a series of die casts - Walmart exclusive ... the 2026 releases are the first with 2-packs. They have not changed the paint schemes/livery look from last year to this year but they all in the new "spectraflame" like metallic look - sharp and classy looking with the biggest release, Dale Earnhardt Jr. (from CARS 1) with an eyelid line and in metallic red.
Nothing too new though Celebration Boost is included ... along with Celebration Sally not out for a few cases.
For completists, this seems to be the 1st release of Hudson Hornet Lightning with the eyelid line (Charlie Checker, & Kris Revstopski with Green Flag and Green Ramone have already been released prior with the eyelid line) ... though many townies now sport a "metallic" sheen even though they are not listed as metallic so green Ramone might be shinier ...
If you are collecting the "metallic" 20th Anniversary Radiator Springs CARS, thisis the only place to find Fillmore so far, in the Walmart only 5-Pack Box Set ...