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Discussion Starter #1
Hello all. I've searched but couldnt find the answer to my question, or at least I didn't see it. Anyway, what is the size of the exhaust for the 5.3 trucks? Looking at it I think its 2.5 inch to the muffler and the muffler back. Looking at changing out the muffler at some time.

Sorry if this has been asked a bunch, thanks for any help.
 

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Discussion Starter #3
That's where I'm getting confused. I've seen 3 inch and 2.5 is what others have said. I know almost every 1500 I've seen has 3 inch or at least it appears that way.
 
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