I just got an invidia 70mm testpipe with cel fix and there seems to be a cylinder inside it with a honeycomb structure that looks like a mini catalytic converter. what is that thing? it looks like it might be obstructing airflow quite a bit

 

its the CEL fix, it's like a mini cat. I doubt it will work though. I had the invidia test pipe w/ cel fix and my check engine light still came on.

 

yours maybe defective. did you reset your ecu when the check engine light came on? if you do it will go away and not come back. i got the 70mm with the cel fix and mine works very well! going strong for about 10k

 

Did you notice any difference in the performance of your car? Thanks

 

I ordered the same one for my 06' Sunday I'm getting my 3" HKS exhaust put on tomorrow and the tp will be on later this week, so I'm assuming I'm gonna have to reset the ecu after I throw it on to?

 

with my invidia 70mm test pipe the bung wasn't long enough and I was still getting a CEL, so I just put spark plug defoulers on there and that solved all problems with the CEL. The defoulers are only like $5 at any autozone or oreilly's