Its a invidia 70mm test pipe with cel fix which actully is a small tube with cat honeycomb material just before the o2 sensor instead of an extended o2 bung. eny way here is a pic of it on just not all the way bolted up.

 

Im running the same one pretty good gains.

 

since its paried with a invida n1 it sounds like a bomb going off when vtec hits. P.S notice my tools. 1 hammer 2.hitch ball. and nail remover tool. dont ask lol some how all the real tools didnt end up in the picture

 

What year is the car?

 

02

 

Give it a week or two and youll get a CEL. I have/did the exact same thing and after I got the CEL I spaced out the O2 sensor and it went away. Just heads up but you should gain some top end with that.

 

awesome i just got my invidia 70mm test pipe couple days ago. imma install it this saturday. should sound good with my invidia dual and s/c

 

^the AP2s are more prone to CEL, let us know how this goes for you.

 

Get used to the smell of fuel.

 

I have the 70 invidia with the extension on the 02 bung, and i added another extension to that. Haven't popped a CEL yet. Boy is it a lot more fun up to 9000. The car use to start losing power around 8000 but power keeps climbing up to 8500 now!