I have a Jeep Cherokee 1991, that needs a new muffler. I found some affordable mufflers that are $40. However, there are two types of mufflers. The SoundFX one, and the Tru-fit one. The website says that tru-fit has OE sound. What does that mean? Which one is quieter?

 

I think you're looking at universal versus tru-fit? The universal one is the right size and has the right connections, but may not have the right mounting tabs. The tru-fit will have all the right mounts to fit like the stock muffler.

 

For starters part numbers and/or links to the products would be helpful.
I am guessing that you are looking at the 18568 and the 18113.
It appears the 18568 is a direct fit.
18113 appears is a more universal one.
I know you are trying to save a couple bucks but I would bit the bullet and buy the Quiet-Flow.
22502.
Looks like a 90 warranty on the 18568 and 18113.
Lifetime on the 22502.
If I were to choose one of the 2 cheaper ones thinking I would go with the 18568.

 

Those are the correct part numbers. Are both of the cheaper mufflers normal/stock loudness? Why would the Quiet-Flow be better besides the warranty?