I just need clamps , I picked the the down pipes mid ,and the exhaust up from somebody abd didbt come with clamps .

So I wasn’t sure what size clamps I needed , I don’t know how they measure the clamps to flanges from inner diameter or the outter.

So your saying use 3 inch v band clamps for the down pipes(3in pipe diameter) to my mid pipes , and use the 3.5 inch clamp for(3.5 in pipe size) the rear exhaust? Same size clamps for the same as the exhaust tubing,

For some reason I thought you went half inch bigger