W126 APRIL 1992 500 sel exhaust. ive been trawling the net for the Y pipe for my sel. alas,to no avail.tried a couple that have been incorrect .trouble is the earlier models right up to 90 are only pipes,that connect by 2 bolt flanges both ends.but my sel has two diff bores sizes at the front pipe end.(EARLIER MODELS SEEM TO BE THE SAME BORE)and also has an oval box which looks like a kat.but isnt.sounding a bit like a mustang at the mo! HELP.located the frontpipes,butterfly boxes and the rear section all for £150!AMAZING! BUT CANT FIND THIS PIECE.