Post by
joe603 »
https://forums.nicoclub.com/joe603-u34652.html
Sun Jun 03, 2007 10:16 am
I would do the CAT-back first. Headers are an introduction to the world of car headaches. They are difficult to install by yourself and require checking the flange bolts regularly. A CAT-back is an install and forget mod that you can do in your driveway with jackstands.
I recommend the Stillen...lots of people can vouch for its sound and performance gains.