[quote author=koreySE link=topic=92037.msg1791013#msg1791013 date=1192722678]
The difference would be cost, looks, warranty, and sound. I doubt there would be a difference in performance between the two.
[/quote]
Hi swooshusn. :wavey: It is pretty much as korey stated. To my experience, the Borla will be a little louder than stock, but not as loud as the Magnaflow. The Borla will be more expensive, but is better quality with a more comprehensive warranty. Of course, then you have the looks of the tips, and that is completely up to personal taste. Performance wise (will you gain HP), no difference.
Also, as Talisman said, they do not currently have a dedicated exhaust system for the I-4 Fusion. However, you can use one of their "Universal Fit" applications.
For what it's worth, if I was looking to replace the stock setup, I would get the Borla (would stay stock as a first choice, but then again, already have stock dual exhaust) :hide:.
In addition, if you are looking to do it for the louder sound or looks of the dual tips, spend the money. If you think you will get more power, don't waste your money. The choke point in a modern cars exhaust system is the catalytic converters. A new exhaust will do next to nothing, performance wise, without other modifications.
Good luck with whatever you decide to do! :cheers: