Available from Track Boss, these replacement bypass restrictor plates suit the correct Cleveland thermostats. These are often missing or damaged. These are required for correct thermostat operation and help make the cooling system effective. Not used in 351m or 400 engines.
The Track Boss thermostat water restrictor is machined from solid brass for precision & longevity. The inside dimension is .750″ which is equal to the original restrictor.
This item is constantly being updated and improved by Tim Meyer at Track Boss.
As a result item shipped may differ to item pictured.





