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jetta cold air intake mk4

  1. MK4 Cold air intake?Magnaflow?

    Hi, I have a mk4 jetta 2.0L(2003).. I am looking into buying a autotech Cold Air Intake, and wondering how it will affect my performance in regards to fuel economy and overall hp/torque. Also, how will having a MagnaFlow after-cat exhaust system (2.25'' diameter tubing) affect my...