I have a 1994 c2500 with a 7.4 and I need a y-Pipe for the exhaust. No one lists the part I need. The closest I have found, is from Walker, part number 40211. What is strange is that their diagram is for 1991-1994 C/K 2500 w/7.4, but the Y-Pipe has a note that it is for 1991-1992 only. Every other part on the complete exhaust system is for 1991-1995. Does anyone know what would be different about a 1991-1992 vs 1994, if every other part is the same?