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Thread: 3" or 4" ???

  1. #1

    3" or 4" ???

    Ok guys ,I have a 04 RXP with an x-charger,42's and Riva 3" power filter.I just put the charger,injectors and Riva power filter on.I 'am not fortunate enough to live down south like a lot of you on this forum.I envy you guys and gals.I live in Ohio .Jet ski season is pretty much over.My question is do I just leave the Riva air in or do I sell it and get the 4" rear air.Is there a noticable difference between the two ? I like the ideal of cold outside air feeding the engine as apposed to the 150+ deg. hull air.I know that for every 10 deg. drop in in comming air performance will increase 1% to 2%.So with this being known should I change it ? I would like to hear from anyone that has ran both.
    Thanks in advance


  2. #2
    Laxcrazy23's Avatar
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    I say go with the 4in rear. air comes right in to the s/c without having to travel through the whole Riva tube.

  3. #3
    JFizzleJR's Avatar
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    The difference is very noticable in every way. The sound is very cool with the supercharger whine coming from right under the seat. If you have good ventilation, your RPMs will jump a good amount over the Riva power filter.

  4. #4

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    u guys r not helping him, i think he means front 4 in like riva. it is the same thing keep your riva 3, air travels better in the riva tubes

  5. #5
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    77% volume GAIN when switching from a 3" Riva to a 4" Kanaflex

  6. #6
    GOT BOOST? Dockside's Avatar
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    he's talking about the rear air. its the best but if you jump waves or ride in the chop go with the kanaflex 4in

  7. #7

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    your right now i see sorry

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