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Does muffler inlet/outlet size matter?

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Old 11-02-2013, 06:42 PM   #1
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Default Does muffler inlet/outlet size matter?

Ordered a sido 3" inlet 2.5" outlet super 10 series flow. Turns out I should have ordered a 2.5" inlet 2.25" outlet. The guy at the muffler shop said I had 2.5" pipe coming in, and 2.25" out (currently have a sido setup, just swapping mufflers). Does it matter? Will it sound different?

Trying to decide if I should exchange for the correct model, or if I should just have a shop use reducers to make it fit...it will be getting welded regardless. I checked flowmaster's site and the outside dimensions are the same size regardless of inlet/outlet size, which makes me think the guts are the same...

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Old 11-02-2013, 06:47 PM   #2
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It's all the same I would just use the one u got might cost a lil more to get welded on but that's it
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