Okay so I'm looking at SD headers for my 06 SC motor. What basically everyone has. But the link I click on in the header thread takes me to SD headers but it seems to me missing a catted DP. And the one that does include it cost over 100 more.. I'm confused on what I should get. .. i was under the illusion that the kit on the link contains everything you need to install headers and have it legal for emissions. Point is I need some clarification and thoughts on what I should do