Omix Cooling System Kit 4.0L- 91-95 Jeep YJOmix Cooling System Kits offer you the exact parts you need to keep your Jeeps cooling system operating at its best. When you are ready to service your cooling system, just drain the old coolant, install the components in our Cooling System Kit and refill the system. Since all of our parts are engineered to meet or exceed OE quality standards, you'll be running cooler knowing that you did the job right. Each kit includes the correct NEW upper and