MR. G GASKET CO. high-flow 180°F thermostat – 4364 copper-brass performance unit for motorsports

Mr. Gasket 4364 is a high-performance, high-flow 180° thermostat engineered to open consistently at 180°F and maintain stable coolant flow under high RPM and pressure conditions.

Built for motorsports and spirited street use, the MR. G GASKET CO. 4364 thermostat combines copper-and-brass construction with a fast-response valve design to reduce temperature fluctuation during hard driving. Unlike standard thermostats that can stick or vary with engine speed, this unit is intended to deliver predictable opening characteristics and increased coolant throughput for better heat management on demanding tracks and in high-performance applications.

How does this thermostat improve temperature stability during aggressive driving?

The 4364 is calibrated to open at 180°F and to remain fully open at that temperature regardless of engine rpm or coolant pressure. Its high-flow profile and robust components reduce the risk of partial opening or fluctuating coolant flow when the engine is pushed hard, helping coolant circulate efficiently through radiators and headers.

• Opens precisely at 180°F for predictable thermal behavior.
• High-flow design increases coolant throughput compared with many stock units.
• Copper and brass materials resist corrosion for reliable operation.
• Engineered to tolerate pressure changes at high RPM to avoid valve hang-up.

Will the MR. G GASKET 4364 fit my performance engine and cooling system?

The 4364 is intended for high-performance street cars, drag race, and oval track applications where improved flow and consistent opening temperature matter. Fitment depends on your vehicle’s thermostat housing bore size, gasket, and mounting style, so verify part compatibility with your engine make and model before ordering.

• Designed for common high-performance applications; check OEM housing dimensions.
• Uses conventional thermostat sealing and mounting methods for easy installation.
• Compatible with typical automotive coolant formulations thanks to corrosion-resistant metals.

How durable and serviceable is the 4364 thermostat over time?

Constructed from copper and brass, the 4364 is built to resist corrosion and maintain function through repeated heat cycles. The materials and robust valve design help preserve consistent opening characteristics across seasons and track events, lowering the need for frequent replacements in performance use.

• Copper-brass construction prolongs life versus cheaper stamped-steel units.
• High-flow valve geometry resists sticking under pressure fluctuations.
• Simple, serviceable design—inspect during routine cooling-system maintenance.

What installation and maintenance tips help get the best results?

To ensure reliable operation, install the thermostat with the correct orientation, use a proper gasket or sealant per the vehicle’s service manual, and refill with the recommended coolant. Bleed air thoroughly from the system after installation and monitor operating temperature during the first road or track session to confirm proper function.

• Install thermostat with spring facing the engine unless manufacturer instructs otherwise.
• Always replace the housing gasket and torque bolts to specified values.
• Bleed trapped air to prevent hot spots and verify temperature response on first run.

Who is this for? The MR. G GASKET CO. 4364 180° thermostat is aimed at drivers and teams who need dependable, race-capable cooling behavior: owners of high-performance street cars, drag racers, oval-track competitors, and garage enthusiasts upgrading from stock thermostats. If you demand consistent opening temperature, higher coolant flow, and corrosion-resistant construction under heavy use, this thermostat is a purposeful choice for performance cooling upgrades.