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Thread: D15 Exhaust question

  1. #1
    Join Date
    May 2013
    Posts
    14

    Default D15 Exhaust question

    Im almost done with my ITB Civic
    just out of curiosity/knowledge

    What would be the best (optimal) IT racing exhaust setup??

    Anyone has tried with and without resonator

    Not minding the decibels..

    Ive read 2 1/4" should be the best..True?

    Im planning on doing a turnout if needed

    thanks in advance for the responses

  2. #2
    Join Date
    Sep 2012
    Posts
    107

    Default

    I'd recomend 2.25, a resonantor after header, turn toward passenger side, and dump over toward passenger side past the tank.....

  3. #3
    Join Date
    Oct 2013
    Posts
    7

    Default

    What do builders consider a resonantor in the exhaust ?

  4. #4
    Join Date
    Feb 2011
    Posts
    3

    Default

    On an ITB Civic I had a 12" muffler which had a turn down in the middle of the car, and registered around 93-95db (ear plugs!!). I switched to a 16" Borla XR-1 and the sound came down to a much more bearable 86db.

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