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  1. #1

    Kawasaki - intake plenum Heat Barrier

    Kawasaki - intake plenum Heat Barrier

    (This part goes between the intake plenum and the cylinder head.)
    STX12F, STX15F, Ultra 250/260 X/LX

    This intake spacer will help reduce the heat transfer form the engine to the intake manifold therefore not heating up the air that is going into the cylinder head. This product has been tested and proven to drop the intake temp by 20deg. adding 2+ Horse Power on a N/A engine set up. Even MORE on a forced induction engine.
    Cool air makes more power because it carries more oxygen.
    This product will benefit stock or modified engines.

    Tested on a 2006 Kawasaki STX15F N/A,
    This engine said to red-line @ 7500 was run to 7000rpm's on the dyno With Out and With the Heat Barrier.
    The computer showed a 2.1 HP Gain with a 19.5 to 22.0 degree drop in temp across the intake plenum.
    Every ten degrees in temp PLUS or MINUS is worth ONE HORSE POWER.

    The 2006 15F is a N/A and was only run to 7,000 rpm. The Ultra is forced and will run a lot higher rpm.
    With that said, it most likley will have even better then 2.1HP gains for the Ultra.

    We ran this product on a 2007 Ultra250X all thru-out the 2009 season.
    After a 50minute + two lap race at full throttle, the intake plenum was COLD!!!

    If you can keep the air from heating up before it enters the chamber, you will make more horse power.
    With out the Heat Barrier in place, the intake plenum acts as an oven that heats up the air before in goes into the cylinder.

    Condenced cold air has more oxygen in it.
    Hot air is already expanded air and has less oxygen in it.
    Cold/Cooler air is the goal with this product.

    10 degrees + = - One Horse Power
    10 Degrees - = + One Horse Power

    At 7,000rpm's, With the Heat Barrier, we gained 2.1HP on a N/A engine set up.
    It will mke more power with a Forced Induction engine set up.

    Comes with hardware and gaskets.
    $129.95 + shipping

  2. #2
    Sounds interesting, how come you do not mention one for the 300x

  3. #3
    GZA's Avatar
    Join Date
    Sep 2010
    New Zealand
    Quote Originally Posted by jwaked View Post
    Sounds interesting, how come you do not mention one for the 300x
    Isn't the intake plastic on the 300? Therefore not the same heat transfer as with metal.

  4. #4
    Banned User
    Join Date
    Jan 2009
    Quote Originally Posted by jwaked View Post
    Sounds interesting, how come you do not mention one for the 300x
    You don't need it. It only makes your boat faster by emptying your wallet.

  5. #5
    UltraKvz's Avatar
    Join Date
    Feb 2011
    Quote Originally Posted by sirbreaksalot View Post
    mmmmmmmmmmmmm here we go again
    Hey waz, I need some fairy dust right now.........

  6. #6

    Join Date
    Feb 2012
    Probably worth the money and trying it if you are in a hot air temperature and warm water climate like Florida for example where heat soak is a factor and you experience a power / rpm drop may help a bit.

    Interesting to note all the latest Riva high horsepower Turbo Seadoo installations have aluminium ( stronger ) intake manifolds and i have seen a watercooled manifold flange on one of these installations as we all know aluminium is an excellent conductor of heat

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