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  1. #1
    canuck's Avatar
    Join Date
    May 2006
    The wet left coast.

    2005 GTX SC External Intercooler Installation

    Winter project for the lowly 185hp GTX is to install a 4" intake, external intercooler and re pitch the impeller. I decided to try this instead of looking for an RXT or RXT-X, I have owned this machine for two years now and have replaced the intake and exhaust valves and updated the flywheel bolts so it's a solid base to work with. These mods are also easily removed and can be transfered to an RXT model if required in the future.

    The biggest project is the external intercooler I know Fizzle make a kit that has everything but requires removal of the exhaust resonator. After experiencing the drone on a previous RXP without the resonator it had to stay. I decided to copy an 08 or 09 RXT-X for intercooler location. I bought a Type 3 water to air intercooler and the factory bracket off an 08 RXT-X, these are the part numbers:

    270 000 718 Rear support.
    270 000 706 Support.
    293 830 124 Rubber pad.
    293 850 093 Straps.

    Fourth pic is the rear support bracket that has to be notched to clear the inlet fitting from the pump, last pic shows the bracket notched.

    To be continued.
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  2. #2
    canuck's Avatar
    Join Date
    May 2006
    The wet left coast.
    Bracket and intercooler placed in hull so I can figure out the hose connections, supercharger to throttle body, intake and exhaust hoses have been removed. I want to get the main cooler connections sorted out before final bracket installation in case I have to adjust it slightly.

    The factory RXT-X cooler has 2.5" connections that angle outwards slightly this cooler has 3" connections that face straight out. I found an RXT-X supercharger to intercooler hose on ebay, part number 273 000 238, I'm hoping with a 3.0" to 2.5" reducer at the cooler connection it will work. The intercooler to throttle body hose, part number 273 000 239, for the RXT-X has been discontinued so I will have to make something from silicone hoses and couplers.

    Stay tuned.
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  3. #3
    How does the type 3 ic compare to the fizzle?

  4. #4
    2000 GPRXP 4tec shooter98xpl's Avatar
    Join Date
    Dec 2005
    Charleston SC
    Hey Canuck, how you been buddy?
    I have ran the type 3 ic in my ski for 4 years with no issues. I did a clean out at the beginning of this year and it still looked brand new.
    Go to and they have all types of adapters and connectors for your jetski and intercooler setup.

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