3dr's and 2wd saph's have the same tanks with the level sensor boss on the saph's blanked off and the water return at the top of the tank. The 4wd and escort ones dont have the water return at the top of the tank, they have it in the place of where the level sensor boss used to be which is below the water level and is larger then the small 2wd one. Yoy cant get the 2wd ones any more but you can get the 4wd ones. I have modified a 4wd one to use with the 2wd application by putting a fitting at the top of the tank and blocking off the 4wd port. I will try to fit the level sensor in the 4wd port at some point.