Is anyone running into problems using straight or test pipes instead of CAts, and getting check engine lights?
When getting straight pipes, is it recomended to tune the car at all?
Thanks

 

I get a cel as well. I have the mods listed in my sig. I spoke to Brian at technosquare and found out that they still do not have a late model 04 reflash available so I went the super afc route for now since I need to squeeze soon to see if it works correctly.