These Reische 170° thermostats are custom made specifically for the GT500 with the same size diaphragm and bypass control as your OEM unit. Proper bypass control means maximum efficiency from your cooling system. Each of these thermostats is modified by hand using only U.S. made parts and then quality inspected to ensure consistent opening temps.
Late model GT500 owners will notice a substantial drop in coolant temps over their stock 192° unit with the Ford-G5 thermostat installed. 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 2007-2014 Shelby GT500 only. All Reische Performance thermostats ship with a new gasket, coolant ratio/additive recommendations, fan settings for popular handheld programmers and are backed by a 5 YEAR WARRANTY.