Flow Series Extreme -16AN Engine Oil Cooler Thermostat

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Part #
FSX Configurator

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  • Designed for large diesel engine and transmission applications flowing up to 33 GPM (125 LPM) of oil and up to 50 GPM (189 LPM) of water.
  • Accelerates fluid warmup time and maintains a minimum fluid temperature.
  • Patented high-flow design with no valves, springs, or other obstructions in the primary oil flow.
  • Features -16AN female O-ring boss ports. Optional adapter fittings available in various sizes.
  • Lifetime warranty. Made in the USA.

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Part # FSX Configurator
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Flow Series Extreme -16AN Engine Oil Cooler Thermostat
Flow Series Extreme -16AN Engine Oil Cooler Thermostat

In stock

Free shipping on USA orders over $49

$399.00

Summary

    Improved Racing's Flow Series Extreme (FSX) oil thermostat is a universal solution that can be used with any oil cooler on any vehicle or industrial application with very high fluid flow rates of up to 33 GPM (125 LPM) for engine oil and 50 GPM (189 LPM) for low-viscosity fluids such as water.

    The FSX was specifically designed for use in diesel engine applications, including semi trucks and large pickup trucks, which require higher oil flow rates than passenger vehicles. It can be used with -12AN, -16AN, or even -20AN fluid lines.

    The device's unique, patented internal design (US patent 9,772,632) ensures a low pressure drop by placing the bypass valve mechanism completely out of the primary oil flow. This arrangement also allows for a compact design.High performance vehicles require large oil coolers to ensure that the oil does not overheat during strenuous use. These coolers also introduce the danger of over-cooling the oil and delaying engine warm-up, resulting in horsepower loss, excessive engine wear and reduced gas mileage. Oil thermostats perform the critical function of bypassing the oil cooler until the oil has reached its minimum operating temperature.

    The thermostat features female -16AN O-ring boss threads and is available with optional AN fittings in -12AN and -16AN. The included brackets allow for multiple mounting options.


    Operation

    Improved Racing High-Flow Inline FSX Thermostat Operation Diagram



    Features and Benefits

    • Designed for specifically for large diesel engine and transmission applications flowing up to 33 GPM (125 LPM) of oil and up to 50 GPM (189 LPM) of water
    • Reduces excessive engine wear and horsepower losses while improving gas mileage by preventing oil temperatures from dropping below optimal levels
    • Maintains a minimum fluid temperature according to the typical stabilization temp in the table below, +/- 2°F (+/- 1°C)
    • Patented, high flow, low pressure drop design locates the valve assembly completely out of the primary fluid flow
    • Allows a small percentage (less than 10%) of fluid to continually circulate through the cooler to eliminate air pockets and prevent cold fluid trapped in the cooler from shocking the system
    • Rebuildable
    • 6061-T6 billet aluminum construction with black MIL-A-8625 Type II anodized finish
    • Lightweight at just 18.1 oz (514 g) without brackets or fittings

     

    Temperature Rating Specifications

    Part Number Typical Stabilization Temp Activation Temp Full Flow Temp
    FSX-185 185ºF (85ºC) 180ºF (82ºC) 203ºF (95ºC)
    FSX-205 205ºF (96ºC) 200ºF (93ºC) 221ºF (105ºC)



    Mounting brackets allow for multiple mounting configurations



    Applications

    • Engine, transmission, differential, and industrial fluid cooling applications flowing up to 33 GPM (125 LPM) of oil and up to 50 GPM (189 LPM) of water
    • Diesel semi truck, pickup truck, generators, and other large high-flow engine oil cooling systems
    • Diesel semi truck transmission fluid cooling systems
    • Diesel semi truck differential and transfer case fluid cooling systems
    • Not for use with corrosive fluids. If used with water, a distilled water solution with a lubricant such as ethylene glycol must be used.

    Includes

    • 1x FSX remote thermostat
    • 2x Zinc-plated steel mounting brackets and screws
    Specifications
    Part #
    FSX Configurator
    Drop Ship Item
    No
    Special Order Item
    No
    Manufacturer
    Improved Racing
    Part Weight
    18.1 oz (514 g)
    Primary Material
    6061-T6 aluminum
    Finish
    Type II Anodized
    Color
    Black
    Minimum Operating Temperature
    -40°F (-40°C)
    Maximum Operating Temperature
    302°F (150°C)
    Inlet Port Size
    -16AN O-Ring Boss Female
    Outlet Port Size
    -16AN O-Ring Boss Female
    Maximum Operating Pressure
    300 psi (20.68 bar)
    Max Recommended Flow Rate
    Up to 40 GPM (151 LPM)
    Fluid Compatibility
    Coolants
    Engine oil
    Gear oil
    Power Steering Fluid
    Transmission fluid
    Instruction Manuals
    Instruction manual for FSX Flow Series Extreme inline oil thermostat
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