• Cylinder 4 Chamber Cooling System


    Cylinder 4 Chamber Cooling System

     Industry first (and patent pending) DOHC EJ Cylinder 4 Combustion Chamber Cooling kit increases coolant flow in the LH head to improve reliability by reducing detonation causing hot spots, reducing EGT delta and improving overall cooling system...

  • GDT1 EJ Cam Seal Install Tool


    GDT1 EJ Cam Seal Install Tool

    GDT and Tier One are proud to offer our Cam Seal Installation tool. A few weeks ago, Chase said to me "We need a good cam seal install tool, the rest of the tools on the market are weak"  (or something like that).  So I hit the CAD drawing...

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  • Light Enough Crank Pulley


    Light Enough Crank Pulley

    The Light Enough Crank pulley provides you with features and benefits that most pulley manufacturers haven't even thought of yet.  The focus was actually making it as heavy as an aluminum pulley can be. I don't like the featherweight pulleys on the...

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  • IAT mounting flange for Bosch style sensors- pipe mount

    IAT mounting flange for Bosch style sensors- pipe mount

    6061 Aluminum Flange for Bosch Style IAT sensors. Weld this flange to your intercooler pipe to utilize a better looking, faster response intake air temp sensor. This style sensor gets the sensing element directly in the air stream to provide...

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  • -10AN Cooling Mod Fitting

    -10AN Cooling Mod Fitting

    This part has been made in response to requests from my racing friends that have heater core bypasses or show cars that run only AN flare fittings. This is not for street cars using a heater.This fitting allows the user to utilize -10AN fittings to...

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