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Reische Performance
Reische Performance CHRY-H1 170° Performance Thermostat (2003-2020 Dodge / Chrysler / Ram / Grand Cherokee - Hemi 5.7L / 6.1L / 6.2L / 6.4L)


Hemi owners have requested a Reische thermostat for their engines so Lethal Performance now proudly offers the only 170° thermostat that is modified by hand and fitted specifically for your Dodge, Chrysler or Ram Hemi. 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 and even deliver better overall performance than our competitor's 160° thermostats. Reische believes the 170° opening temp is the ideal balance for high performance engines, providing high flow to your radiator by 180 temps while still providing good all season performance. With proper fan settings your coolant temps will stay in the mid-180 to low 190s, giving those running high levels of timing and/or boost added protection against engine-damaging detonation as well as maximum hp.

All Reische Performance thermostats are backed by a 5 YEAR WARRANTY.

2005-2019 Chrysler 300 5.7/6.1/6.4L
2008-2020 Dodge Challenger 5.7/6.1/6.2/6.4L
2006-2020 Dodge Charger 5.7/6.1/6.2/6.4L
2004-2020 Dodge Durango 5.7/6.4L
2005-2008 Dodge Magnum 5.7/6.1L
2003-2019 Dodge/Ram Trucks 5.7L
2005-2019 Jeep Grand Cherokee 5.7/6.1/6.2/6.4L

Cooling Fans AC Off
Low MPH LS Fan On: 191° (on 190°/off 185°)
High MPH LS Fan On: 191°
Low MPH HS Fan On: 196° (reverts to LS @188°)
Low MPH MS Fan On: 194°
High MPH HS Fan On: 196°
High MPH MS Fan On: 194°
Cooling Fans AC On
LS Fan On: 191°
MS Fan On: 194°
HS Fan On: 196°

A low coolant temp CEL code (PO128) may appear if your engine is still running on the factory tune with our (or any low temp) thermostat installed. The CEL may cycle off (and back on) but typically there will be no other detrimental effects, however a Diablosport or custom tune (also available from Lethal Performance) should resolve this issue.

Vehicle: 2015 Charger 6.4L - CHRY-H1 - Diablosport Tune - Mileage: 26946 - Test Date: Sept 17, 2017
Conditions: Engine @ operating temp, recommended fan settings installed, ambient temp: 92-94°
Sustained idle: ECT 192°
60mph cruise: ECT 185°, IAT 98°
Highest logged: ECT 194°
Lowest logged: ECT 185°
Vehicle Application(s)

This product fits the following models and years


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