The 2jzgte coolant pipe o-rings are located on the coolant pipe that connects the water neck to the water pump housing. These should both be replaced when the coolant system is being serviced. Both Toyota OEM O-rings are included. If you need the coolant water neck gasket as well please order the water neck gasket kit. These O-rings fit both 1jzgte and 2jzgte engines but do NOT fit the 2jzge.