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  1. 2014-2018 Mazda 3 Skyactiv Engine and Performance
    hey guys, i was wondering, has anyone removed the 2nd cat on their 3rd gen? im thinking of doing it but i dont want to lose hp/torque. i know the corksport catback removes the second cat, but idk if their res in their midpipe is special for creating backpressure or something. so, my question is...
  2. Buy / Sell / Trade
    Hey, I live in crapyfornia and need cats for smog, anyone who lives on a free state who does not need them? Or anyone with cats for sale for that matter... thanks guys
  3. Mazdaspeed 3 Parts - Buy / Sell
    Is anybody interested in NOS OEM Speed3 exhaust down pipe & catalytic converters? Original never used or installed with tags L3F2-20-55XC CATALYTIC CONVERTER MazdaSpeed3; MSRP $665.86/ online $499.40 , L3F2-20-50XE L3F22050XE - Converter & pipe 2.3 LITER MSRP $965.62/ online $724.22 & gasket...
  4. 2010-13 Mazdaspeed 3 Engine and Performance
    Alright guys let me get some opinions. I currently have the resonator remover on my speed. Everything else is stock still. I'm not looking for power gains just some sound. I want to remove the second catalytic converter. I have a shop locally that will do it and put a straight pipe in...
  5. 2010-13 Mazdaspeed 3 Engine and Performance
    Does anyone know how many catalytic converters the 2010 MS3 has, and where they are located?