Originally Posted by Old Dodger
Guess I will have to check around for a supplier. Appreciate the information. Guess I will need to look for a name stamp on my muffler. It has a 4 inch pipe with a huge chrome extension. Not sure what the OEM looks like.
On the diesels, the muffler is normally big enough to hide a dead body in it. Seriously, they are huge round beasts. A stamp is a dead give away, but you can also, look at how the exhaust is clamped to the cats, if it's a band clamp then it's aftermarket as most systems will replace the OEM U-style exhaust clamp.