Need help identifying these pistons

[dimaiox1]

Hello everyone. I’m building a 4.6 with a Saleen supercharger. When I removed the heads I noticed the pistons have a smaller dish possibly for higher compression and a notch on them. The pistons have no markings at all to tell me a brand. But can anyone guess what these pistons may be? This is supposedly a 2003 mustang GT 2v

 

[Noobz347]

Of they're OEM they are [cast] pistons.