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  1. #1
    ATC2006's Avatar
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    Do you need a Flame Arrestor Air Filter?

    I want to put a custom 4" intake on my '07 RXT...Do I need a flame arrestor air filter? I noticed that the riva kit comes with one. I read that some people are using the 4" stainless mesh air filter that is not a flame arrestor? Can the engine back fire through the sc and spark the fumes in the hull? I am not sure how the flame arrestor works or if it is needed. Please help me...I do not want to have any problems if you know what I mean! Thank you, Rick


  2. #2
    formerly Gold06RXP Turbo Nick's Avatar
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    2 strokes use flame arresters. 4 strokes use air filters. And yes you should use an air filter w/ an outer wear to keep water out of the engine.

  3. #3
    The intercooler and supercharger do act as a flame arrestor.The only reason is to keep out the water.The Riva rear intake only uses a outer wear.

  4. #4
    ATC2006's Avatar
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    Thank you for the info, you guys know everything!

  5. #5
    shhr's Avatar
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    I dont run a filter at all just a open 4" intake over 20 hours with this set up so far

  6. #6
    HOSS's Avatar
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    Per U.S. Coast Guard regulations, you must run a flame arestor. Not all do. The stock intercooler has a screen which is the flame arestor. I pulled mine screens out. Its against regulation but there is no way for them to check. A flame arestor does nothing for water. I also run with no air filter as I`m not running in dust. Stock does not use a filter.

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