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Discussion Starter #1
Hello I am looking at doing my exhaust on my 2013 Chevrolet Impala 3.6 I am wondering I have looked around and see different things that are exhaust is 2.25" and others say it is 2.5" straight thru and then where it y's it narrows down to 1 7/8". Can other members help clarify this for me. Thank you
 
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