open system is the way to go. you are looking for a 1992 and up jeep cherokee 4.0l hi out put. get rid of that old presser bottle & get a over flow bottle. and 6 feet of 5/8 heater hose when u get the heater valve if u do. i do not run one or need one. this swap is worth wile and i am very happy with it .you will be to!