This modified premium thermostat has a larger heat motor/spring assembly for more precise temperature control along with a heavy gauge chrome plated steel housing. There are many products on the market for this application but we believe the NB-54 thermostat to be the absolute highest quality low temp unit currently available. 100% made in the USA.

Whether you are using an aftermarket radiator or not, this thermostat will provide the best possible heat dissipation from your setup along with a faster warm up time and better cold weather performance than a 160° unit or a thermostat with holes drilled in the diaphragm. We believe the 170° opening temp is the ideal balance for high performance engines, providing high flow to your radiator by mid-180 temps while still providing good all season performance. With proper fan settings your coolant temps in cool weather will be in the 170s and in hot weather the 180s, giving those running high levels of timing and/or boost added protection against engine-damaging detonation as well as maximum power output.

For small/big block Ford (excludes Ford Cleveland & pre-1967 390-428ci engines), small/big block Chevy, Pontiac, Buick, some Chrysler and many, many others. Please go to: http://ReischePerformance.com/NB54data.html for a complete list of all applications. May also be used in aftermarket thermostat housings that require a 54mm, 2.125" or 2 1/8" diameter thermostat. The NB-54 thermostat does not include a gasket due to the multitude of possible applications. All Reische Performance thermostats ship with coolant ratio, additive, fan setting recommendations and are backed by a 5 YEAR WARRANTY.