2014 Summit Racing 2.5" dual kit

Am I doing something wrong? I'm looking on Summit for 2 1/2" pipes and all I see is 3" for my 68 B'cuda. There's a 2 1/2" universal for $128, but I know that's not what you guys are talking about. The next one is Part Number: SUM-680145-NM for $260, but that is 3". Anyone have a part number?