Bit the Bullet on URD Spec Headers

Just purchased some URD Headers on the black friday sale so I figured now was the best time if any.
Wanting to know if anyone has had them for a while on a N/A engine?
Whats the pros and cons?

 

Pros: more horsepower in the top end. bolt on.

cons: lose the cats= not emission legal, lose some low end power.

Do show the pics when you get them though

 

Thanks man,
I haven't heard about or seen a whole lot of people with these headers. I was just curious as of why? Maybe its because they're still new. And I definately will! Along with some real world results. They look to be very good quality and not to mention those mighty sexy curves in them!

 

"Lose some low end power." is that an assumption or a known fact. URD says it is designed specifically to reduce this possibility, so my assumption is that the masses will make an assumption that the power loss is actual rather than presumed?