Catless triggers a code..
Our cars are still new enough that they don’t have to go thru a smog test, they just plug it into a code reader and if it doesn’t register any codes it passes.
You will not pass unless you have something like the AP to eliminate the code from triggering.
Well im not sure how used your pipe was, but mine was on the car for barely a month...so not exactly used...and considering i bought it new for $681.42...i think asking $230 less for 1 month of use is pretty reasonable and as it states above...price is negotiable and a lower reasonable offer is...