I am on my fourth pair of Magnaflow cats. The front and rear cats take turns failing within 2 or three months of each other. I start to hear a faint rattling sound at idle then I rev the car with my door open and hear the rattling even more while it decelerates. It has been a little over 2 months since I replaced the front one this time but not sure if its the front or rear now. What it is that keeps happening is the internals of the cats are failing and getting blown out through the tip as a powdery substance over time. I have an UEL header but I'm being told that is not the issue. My Subaru specialist is telling me that this is a common issue for these older 2.2 -2.5 EJ's when putting on after market cheap cats like Magnaflow or Eastern Catylitic. He told me that the only way to get this to stop is either buy a OEM exhaust off of a private person and saws all the cats off and put it on my car or buy an OEM because by law the salvage yards are not allowed to sell used cats for some reason. Either way I'm annoyed with this issue over dumb shit. I'm just glad that it is not screwing with the performance of the car. So I can put up with the rattle vs going to my exhaust dude and telling him I need another $130 replacement cat again. I would really like to either eliminate one of the two cats or gut one or both of them (I'm not a liberal so I don't care about the CO2). but that leaves me unsure of the CEL. I am familiar with the plug fowler trick but wondering if I gut the cats maybe I would need a fowler on both to stop a future CEL (my old friend P0420)? All I know is I had enough of chasing this issue for the last 2 years and would rather have no cats and no issues like my 05 LGT. The other issue is my 95 BK gets the sniffer up the tail pipe for emissions every year so I hate to do a delete and find out that I pulled my own pants down at the test and fail. Any ideas on this?