Originally Posted by BurnedRubber
I'm looking at fixing up a 2011 or newer salvaged mustang. I'd like to put in a new exhaust right away and I'm hoping for some guidance. I will be beefing her up as I go, looking to push 600+ ponies in the end, but it will not be right away. I'd like to keep it street legal, so I plan to keep on the cats, but put in new bbk headers and a borla cat-back exhaust (probably s-type). I believe they make a 2.75" and a 3" system but I would like someone to verify that the 3" system fits onto the stock cats. Or maybe someone makes an aftermarket performance cat that I should look into? I'm aware that the engine needs proper back pressure. If I run a 3" exhaust with everything else stock for a summer, will I have any performance issues?
Thanks to any and all who respond.
Yes a 3" mid pipe will work with the factory cats. U won't have any performance issues.
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