My understanding is both OE cats are actually high flow, and a real advantage to the "scuba" is it does a great job of controlling "rasp". Still, if your intent is loud, the "scuba" will probably have to go. In terms of bolt-on performance, unless you go to F/I, the "scuba" is fine.
Question about converter.
I want to switch out my factory cal converter and replace it with one from magnaflow. Will this help my borla exhaust sound better and louder and which ones can I choose from. The magnaflow website was kind of confusing.
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