ICHIBA is selling test pipes with high flow cats.I am confused by the words.

 

HFCs are different from resonators. If you have cats of any kind you should not get CEL. BUt test pipes usually mean no cats, you have to get non-foulers to eliminate the CEL.

 

After 250 & so you'll get service engine light.However it won't effect the performance or anything but, best way to solve the problem like tomcatm mentioned 02 non fouler. & it's usually available @ any local auto parts store.

 

I tride non fouler before,but these is not enough space to move O2 sensor back that much so my CEL still came on. Mine is 04 model

 

Um I wouldnt be too sure about it not affecting performance. IMHO any kind of cel, usually one resulting from emissions related reason, does affect performance.