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  1. #1

    Black mark on rear bumper

    Hey guys, just wondering how can i get my car not running rich? My rear bumper has black marks and its getting kinda annoying washing it every week

    cheers

  2. #2
    what petrol do you use ?

  3. #3
    BP ultimate or 100 V racing

  4. #4
    BP ultimate is much cleaner, my car doesnt normally run rich but with V power it usually leaves black marks anyway. How long since this has been happening ?

  5. #5
    ever since i put my bc spec 2 exhaust on about 3 months ago

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