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  1. Hks? Spt? Subaru

    Everyday Impreza Talk
    I am pretty confused by this is i know spt is subarus performance parts brand but i have seen the name be interchangable with hks what is hks?
  2. Up Down Pipe???

    Engine Modifications
    So what exactly does a down pipe do? Whats the best brand? If i have a subaru spt intake does that change which one should get? Any help is appreciated just trying to understand the car one part at a time. Any info on headers would be helpful too.
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