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cold air intake

  1. Cold air intake

    MK4
    Just bought a new mk4 gti vr6 and the check engine light is on the person i bought it off said it was because of the cold air intake so i am going to buy a new one but i was wondering what would be a good one to buy to add a little bit more power to the car
  2. Intake and vacuum lines

    MK5
    I want to install a CAI on my 2.5 and i noticed two vacuum lines that operate off the intake close to the throttle body and im wondering what they go to/what they do and if the CAI's i find online are suited to accept these two lines without throwing a code or harming anything. also, does the...
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