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  1. Drop in filter VS Cold air intake

    Focus RS Performance
    Hi guys, this is my first post. I've been reading a lot on this forum but the time has come for me to buy a filter. Is there a benefit to having a cold air intake or just a drop in filter with maybe a mountune elbow. Which sounds better in the drivers seat? Has any one started with a drop in...
  2. Air Intake & Filter

    Focus RS Accessories
    What's everyone's preference for cold air intakes and filters? Looking for strictly performance use on track. Had the following in mind: -Injen -Mountune -Mishimoto
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