JohnnyTightlips
Motorhead
You could just cut the cat but depending on emissions you probably need one. You can get a race pipe to replace the catted section. You could also get a catless ebay downpipe. Sadly due to the pandemic both of those are very hard to find. You might have to just pony up and buy a legit catted DP from CS or another vendor.I only drove about 250 feet. Parked it, now I’m gonna reinstall the sensor and drive to an exhaust shop.
Do I have to replace the whole down pipe? Or is there cleaner?
https://corksport.com/mazdaspeed-3-racepipe.html
https://edgeautosport.com/cp-e-qkspl-downpipe-catted-mazdaspeed-3-2007-2013/
https://www.cobbtuning.com/products/exhaust/mazda-gesi-catted-3-downpipe-mazdaspeed3-2007-2013
Not sure about these guys but look decent - https://www.ultimate-racing.com/products/mazdaspeed3-downpipe-ver3