I got a guy around my area says hes selling crower rods for d series but theres no box. Markings on the rods read a4 on the bottom and 528 on the side. Also says they have been balanced? How can i tell if there legit?

 

yeah thats what i got from another guy too so thats what iam thinking they are. are they decent for boost?

 

my crowers sure as hell don't look like that. look on the rod cap bolt mine say crower