just because they have different parts numbers doesn't mean they are the same exact part, look at the sn-95 UCA's, 3 different types, all have their own part number, but guess what? they're all the samebigcat said:i just looked in a newer book, and it lists the same muffler for ALL V6 options in 05/06. SO, maybe ford superceded the mufflers.
what did the parts director say about it jenn? IF he can come up with this conclusion, then he is doing his job. if not, well, we know the answer.....
no bushing differences or design. the wrist pin varies in teeth though certain years but that's about it... makes you think what else they are covering up 
