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  1. BMW Tuning Forum
    have a BMC CDA air filter - carbon fibre sealed unit type is it worth fitting it to my 323 ? have read i wont gain any extra bhp but will improve throttle response - so is it worth it to fit it Thanx
  2. BMW 3 Series Forum - Technical Talk on the BMW E21
    hey guys, my BMC panel filter is due to be cleaned and re oiled. any ideas of the best way to do it, or do i need to buy the £20.00 kit? Cheers Gav
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