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Engine Thermostat 180 Degree 07-11 Wrangler JK 3.8L RIPP Superchargers. Replace your stock 210deg thermostat with this drop in 180deg Thermostat. This will keep the engine much cooler on the road, towing or on those long days on the trails. Simple drop in install, no modifications required. Works with RIPP Provided tuning or stock. RIPP Tested,Customer approved.