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catalytic converters

  1. New Rear Catalytic Converter

    Problems & Maintenance
    I just replaced my rear Catalyic Converter as it’s called. ( one after the Manifold one) I replaced it with an aftermarket Walker 55585 Ultra EPA Certified Catalytic Converter. I know it’s always better to keep original but unfortunately some time ago when replacing the exhaust that rusted out...
  2. Replacing catalytic converters

    Gen 3: 2005-2009
    2005 outback 2.5 non turbo, federal emissions 270,000 miles with the engine rebuilt I’ve replaced both O2sensors and still have the p420 codes I am getting a LOUD buzzing sound- gonna replace muffler at the same time It looks like there is a Y junction among the converters I’m having trouble...
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