Stop and go traffic is harder on a thermostat than a track session, because the valve keeps snapping open and shut as the coolant swings. Brass and copper handles that cycling, and the pressure relief valve stops trapped pressure from holding the thermostat closed when it should be opening.

Mr. Gasket 6367 Thermostat Features:

• Designed to open at 160 degrees every time, regardless of engine rpm.
• High flow design.
• Brass and copper construction eliminates the damaging effects of cycling in stop and go traffic.
• Pressure relief valve fitted.
• Includes the rubber gasket.
• Sold individually.