De-cat pipe, im going to get rid of my old cat which is nakered, and get a de-cat pipe, just wondered, what you do with all the sensors, sorry i'm useless with cars just want my car to run properly.
Most people use a conditioner which consists of having a bung welded in to the de cat pipe and a spacer affair that lifts the Co2 sensor slightly out of the gas stream, Ive not had experience of this so cant really comment, however I took a different approach using an electronic simulator, you should find the info you want in the link below.
l viewtopic.php?f=7&t=25880 (http://www.mr2roc.org/phpBB3/viewtopic.php?f=7&t=25880) l
so far Ive completed around 20000 miles with no CELs using this so I can strongly recommend it.