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exhaust patterns

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    #1

    exhaust patterns

    Hey everyone im just wondering is there any change from goin with a 2.5 downpipe with a 3 inch exhaust fromt he flexpipe back to the muffler? Is there any real serious gain or just more noise.
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    #2
    more noise ! 3inch dp would be nice tho !
    h23a3 cb7 turbo sold

    FS: 1 Piece JDM Headlghts blackhoused

    My Members Ride !
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    '07 GTI Mk5 6spd

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      #3
      better breathability. backpressure is the enemy of a turbo

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        #4
        if u have a 2 inch hose that connect to a 3 inch hose u will never see any difference at the end .. might as well do 3 inch downpipe and make sure the turbo outlet is 3 inch too

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