Quote:
Originally Posted by FR-S Matt
It will help a little bit, but not a lot. The resonator and mufflers do more. I had a hell of a time fighting rasp on a Nameless 3" header back and that had a cat and 2 resonators. The pipe size was just too large.
My only argument on the cat in a high flow header is the life span. They don't last as long as they do in the front pipe.
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P&L offers a lifetime warranty on the cat in their header, which is awesome. If the cat doesn't do much though, I may as well get a resonator or two added to my front pipe.