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The Dyn-O-max 17519 is 2.5" in/out. Our trucks have 3" in and out or dual 2.25" outs so that is wrong. The ultra flo is a lot like a magnaflow straight through that is widely used on our trucks. The one you mentioned is like the 14" Magnaflow so search that for lots of opinions.
If I get a Dynomax, it will be the VT style.
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