Improved Racing

FSM-165-08AN

Improved Racing FSM-165 High-Flow 165F Transmission & Differential Fluid Thermostat, -8AN

Thermostats

Reduces excessive wear and horsepower losses while improving gas mileage by preventing fluid temperatures from dropping below optimal levels. Maintains a minimum fluid temperature of 167 F to (74 C) in most conditions
Proprietary 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 to eliminate air pockets, prevent cold fluid trapped in the cooler from shocking the system, and to allow draining during oil changes
Lightweight (12.7 ounces, or 360g, without brackets or fittings), rebuildable, and constructed from 6061-T6 billet aluminum with a black anodized finish. Female -10AN O-ring boss threads. Includes four black anodized aluminum fittings with Viton O-rings for -8AN lines
Made in USA. Lifetime manufacturer's warranty

Improved Racing's FSM (Flow Series Motor Sport) oil thermostat is a universal solution that can be used to control engine, transmission and differential oil cooler temperatures in any vehicle. This thermostat bypasses the oil cooler until the oil has reached a minimum temperature of 165°F (74°C) +/- 2°F exiting the heat source. Maintaining the oil above this minimum operating temperature reduces engine wear, improves gas mileage and improves horsepower. The device's unique patent-pending internal design 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. It features female -10AN O-ring boss threads and is available with optional fittings in -6AN, -8AN, -10AN, -12AN or 3/8" hose barbs (make your selection above). The included brackets provide multiple mounting options.

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