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That just looks like a better header! I'd be interested in a catless header design for optimum efficiency, but would probably go for a catted downpipe/overpipe to pass emissions ( there's a visual check) and for green feel-good points. IMHO the header cat is the more important one to remove for power gains, so that further downstream cat shouldn't matter too much. Now make it so Nameless, so you can have all my pennies!
As much as I'm averse to buying parts that don't make power, I would buy a resonated midpipe if it functioned well in noise reduction and was lighter than the OEM component.
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