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Item #: 011201
Availability: In Stock
Usually ships In 1 - 2 business days
Price: $179.00


    The Racer X Fabrication MR2 coolant neck for the 1991-1995 Toyota MR2 is an OEM replacement and cleans up the engine bay. The Racer X coolant neck eliminates the remote mounted radiator cap and assembly from the strut tower. The radiator cap is relocated to the top of the coolant neck and still retains the highest fill point position. The coolant neck uses a similar design as the OEM component, it keeps an indirect flow path not found in any other aftermarket coolant necks on the market. This design prevents false radiator cap actuation due to the stalk being pushed forward out of the flow path from the coolant tree.

    The coolant neck is machined entirely from 6061-T6 aluminum and is comprised of 3 components: the body, radiator cap stalk, and hose barb. These components use industry standard o-ring boss seal fittings, respectively these sizes are -12AN, and -16AN. The small detail allows complete flexibility of the coolant neck. Want to reroute your long OE coolant line that routes to the cabin wall and then below the car? This can be done by simply removing the hose barb fitting in favor of -16AN male fitting with a hose end and line. Finally, we added an additional 1/8 NPT port for simple installation of an aftermarket water temperature gauge, gone are the days of cutting your OEM coolant line to add an inline component for your gauge.

    • Racer X Coolant Flow CFD

      The flow path of the Racer X coolant neck is offset from the pressure cap, just like the OEM coolant neck. The offset path is necessarry to prevent direct flow to the pressure cap and ensures the correct functionality of the radiator cap. CFD shows flow path of coolant through the system.

    • Welded Assembly Coolant Flow CFD

      Welded coolant assembly provides a direct flow path to the pressure cap which can lead to the radiator cap opening under incorrect temperature range.

    • Swivel Fitting Included

      The turbo hose coolant line includes a swivel fitting in place of a welded fitting. The swivel fitting allows for thermal changes and engine vibration which is continuous. This small addition prevents cyclical thermal failure and fatigue failure which can be associated with a welded coolant barb.

    What's Included

    • (1) Racer X Coolant neck
    • (1) 1/8” Stainless steel NPT plug
    • (1) 90 degree hose barb


    • 1991-1995 Toyota MR2
    • Toyota MR2 Gen 2
    • Toyota MR2 Gen 3


    Proposition 65

    Off Road Use Only

    WARNING: Racer X Fabrication products are intended for off-road / competition use only and may never be used on a public road.

    Overall Customer Rating of 2 Reviews:
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    Amazing quality, looks fantastic. I bought it for my 3sge to see if it would work along with the racerX coolant tree. It isn't compatible with the stock 3sge intake manifold (doesn't clear the throttle body) but I already ditched that. Much better alternative to the stock coolant neck setup. Very happy.

    Billet Filler Neck MR2

    review-star review-star review-star review-star review-star
    • Quality part
    • No O-Ring
    • Lack of install instructions.
    Great product, nice upgrade from the factory filler neck which ended up forming a leak on my car. Install was pretty straight forward. Looks and functions great. Would give this product a 5 out of 5 stars if it came with the O ring to install.