Description Reviews This aluminum water pipe is the best new options for longevity. Fits all gen 2 cars and is the pipe that goes from the thermostat to the water pump on the back side of the engine. The fail point on this part is the o-ring and flange that goes into the water pump. It can crack or break off if the car is over heated or someone gets too aggressive when installing a new thermostat. This one will never fail and can be reused as many times as you would need. We do sell just the o-ring if you ever need it. Don't forget some quality fluid!