HI i have just purchased a cat back for my 02 bug and it has turned up but have checked the measurements and one end is 3 and a half inch which i guess goes too the back box and the other end is 3 inich which must go to the down pipe but not shore that its going to fit as i have been told it shoud be 2 and half inch to the downpipe as mine is standard so was wondering if its gonna fit or not???

thanks
jamie

 

if the flanges are the same size should be ok