Cel came on a few months ago and one of my cats are bad on my 05 with 122k miles... I will be adding a x pipe plus the dual in out magnaflow muffler... So I'm thinking of getting hi-flows ... I've searched and can't find a consistent answer.. Will hi flow cats keep my cel light on? I'm thinking about going the universal route... Anybody with different cats care to help? Part numbers would be awesome... Also in a related question... Will A universal x pipe on eBay be the the same as a magnaflow x pipe?? Any help is appreciated!