W2's INFORMATION PLEASE

I BOUGHT A SET OF W2's THEY ARE #P4532693 HEADS.....THEY ARE OPEN CHAMBER DOES ANYONE HAPPEN TO KNOW THE CC OF THE COMBUSTION CHAMBER OF THESE HEADS.....THEY HAVE THE RIBS AND MOPAR W2 LOGO ON THEM.....WHAT CC AND WHAT YEAR ARE THEY.....THANKS WEBBY.