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Ok based on this, I think it's a bad cat. Good thing my catless downpipe is on the way.

So far I have focused on handling mods and general maintenance like fixing leaks, and vvt service At this point, my mod list is this Cobb access port with Freektune OTS+ tune Bilstein B14 Coilovers Whiteline Rear Swaybar and Endlinks Corksport HPFP Internals Corksport RMM Damond PMM, TMM Nitto...

Yeah that was a typo for sure. I will get that pressure relief valve and see if that fixes it. If not then hopefully getting the injectors cleaned will. I’m thinking I will get a eBay downpipe too as a means of eliminating possibly clogged cats from the equation if I’m still having issues. Do I...

Hello, I have been browsing some threads on here and noticed several people had similar issues to me. Essentially what is happening is when I attempt to put a small load on the engine in 3rd gear and higher between 2500 and 3000rpm, the car stumbles and bucks before accelerating. This issue is...

Hey guys, I have been on the Mazdaspeed discord for at least a year, and I am finally getting around to making an account here. I have a 2009 white speed3 that I bought bone stock from the first owner. I have been prioritizing maintenance and adding fast bits as funds permit.