Been looking into this exhaust just curious about hi-flow cat vs. no cat. If going with the no cat option is the stock cat replaced by straight pipe? Will I need to worry about any CEL issues?
Hi-flow can still throw a CEL (though not typically on proteges). If you don't have emissions testing I would go catless and get a $3 non-fouler to space the rear 02 sensor. P5s need all the power they can get.
Hi-flow can still throw a CEL (though not typically on proteges). If you don't have emissions testing I would go catless and get a $3 non-fouler to space the rear 02 sensor. P5s need all the power they can get.
there's an o2 bung welded in where your existing o2 is. The spacer/non-fouler/simulatar whatever you want to call it will be put in there first then your o2 sensor and no CEL.
