I was wondering if anyone made a longtube header that works with the stock cat. Or what header would be a good idea to go with if I wanted to keep my cat and not replace it with a Y-pipe.

 

The shorty and mid-length headers work with the stock cat.

If you go with longtubes you need to have a cat after each collector. This is still technically illegal since your car originally came with only one cat. To remain "technically" legal you can't change the number or location of the cat(s). That said, they will still work fine to clean the exhaust.

FLP full length headers come with catalytic converters. You can add cats to other full length headers. You will need to have the work custom done in that case. An exhaust shop can add the flanges to the cats and fab a y-pipe.

 

I have been looking at the pacesetters for such a long time, however I would have to remove my EGR and AIR because I hear the plug in's in them are crap. So I would have to get either block off plates or run mid-lengths.

 

can someone explain this to me better? cause im in the process of getting my heads and intake ported and polished, and a valve job, ive got a comp cams 224/230 cam, what type headers do i need? this is a daily driver....ive been told hooker longtubes, but if i do that, what will happen to my cats?