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Sidewinder Stock Manifold

Discussion in 'SideWinder Trail Talk' started by Mototown, Nov 22, 2020.


  1. Mototown

    Mototown TY 4 Stroke Junkie

    Messages:
    661
    Location:
    Ontario
    Country:
    Canada
    Snowmobile:
    Apex 40 th
    Time for port matching, it probably won’t gain much but it gives me something to do .. lol
    The Yamaha exhaust gasket is matched almost perfect to the head outlet openings, makes you think Arctic cat made the exhaust manifold.. lol
    image0.jpeg image1.jpeg image2.jpeg image3.jpeg
     
    sideshowBob, SideHogger and 74Nitro like this.
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  3. sideshowBob

    sideshowBob Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    994
    Location:
    North West Ontario
    Those Sidewinder stock exhaust manifolds are ugly!
    Good thing they are hidden away so we don’t have to see them.
    Port matching should help with flow and heat retention.
     
  4. HURRICANE

    HURRICANE Advertiser Advertiser Vendor VIP Member

    Messages:
    2,068
    Location:
    Prescott Ont.
    There are huge gains in the stock manifold but they aren’t from port matching. If you look at the shape of the tubes as they are cast, you’ll see how far from even they are. That’s why it’s so expensive for us to port the stock manifold. We actually cut it apart to change the tube directions internally
     
  5. sideshowBob

    sideshowBob Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    994
    Location:
    North West Ontario
    Dave
    What does the dyno show compared to stock on your manifold mod?
     
  6. justinator

    justinator Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    829
    Location:
    Maine
    Country:
    USA
    Snowmobile:
    2020 sidewinder xtx se
    Was just discussing this with someone the other day. Saw this on hurricanes site and its pricey so I figured it was quite involved and not just a simple clean up. Might be a good middle of the road option for those looking for stock manifold reliability assuming the re-welded area of the manifold holds up long term.
     
  7. HURRICANE

    HURRICANE Advertiser Advertiser Vendor VIP Member

    Messages:
    2,068
    Location:
    Prescott Ont.
    The stock manifold mod flows like the performance header and runs with the header flashes. The area that’s welded back together is strong and virtually invisible
     
    sideshowBob, justinator and 1nc 2000 like this.

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