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  1. BMW 3 Series Forum - Technical Talk on the BMW E46
    Which panel filter do you rate or recomend for my 320d (150bhp)
  2. BMW Tuning Forum
    Can someone expand on my thoughts of either installing a Pipercross Velocity Intake System or a Viper Kit over one of their standard swap panel filters. Would I really see the benefit in low/mid rev pick up and cold the increase airflow play havok with the engine management. I'm looking into a...
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