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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
So it is 2.5in for the single side an 3in for the side with two openings, or do I have it backwards. I have heard of 2 different sizes. It is a 2007 with the hemi and has flowmaster muffler on it.
2.5" inlets with a 3" outlet. The rest of the factory Y is fine (at least the 08 is), just the crimped up section where they come together is what needs to be replaced.