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GTB is right..high flow race cats are a recipe for rasp with the stock cans. I get a little rasp at WOT near the top of the tach with my setup..I actually like it. Gives it that raw sound..
Dave
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Current ride:
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2007 997S coupe SY, Blk sport seats, Nav, Bose and alum. door sills..that's it.
Mods: X51 headers, AWE Cats Borla mufflers...
X51 intake to come soon..
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