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hfc exhaust sound

  1. Exhaust

    General Subaru Discussion
    I have a Subaru rs 2004 and I am looking to buy/upgrade the exhaust system for my car. I live in Australia Melbourne and I wanted to ask if anyone knew the best exhaust to get for the required decibels that will still make my car sound loud and nice.
  2. High Flow Cat? & selling wrapped & sealed TSUDO HFC w/ less than 200 miles on it

    N/A Tuning
    I recently bought a Tsudo HFC ( wrapped it and sealed it with high temp silicon) and my car now sounds like King Kong farting in a can and runs like dog s**t, it’s also throwing the p0420 code as I knew it might but thought the 02 extender would prevent that. Now before everyone explodes on me...