No, seeing as how the Six Pack Stack is USP Labs product.
As to your question, you can use any pre-WO supp pretty much with this stack; you just have to realize that Recreate has some caffeine in it so you will be taking a large amount of caffeine, but otherwise you will be fine. The new Grape JP8 has only 120mg Caffeine/scoop, so I would suggest starting with 1 scoop + 1-2 Recreate pre-WO and see how that works for you. Good luck and let us know how it goes :head: