Identifying piston set

[bossladys 911]

I have a set of great cylinders and pistons but am unsure of the application . The only markings I see are the cast code on the pistons . It reads 84V53 . Any help is appreciated .

[Henry Schmidt]

Post pictures and we'll tell you what they are.

[bossladys 911]

Thanks but I may have found the info I need . Part # is Mahle 503-15-90 for I believe a 73 CIS engine .

[robmog]

that is the same # as in my 1972 2.4 E piston.
btw, i'm looking for a set, are they for sale?
bob