You may need a tool to lift the car and various other equipments as well. Once, you have replaced the exhaust parts of your car then it is preferred that you allow the car to cool down. You can replace them on the holiday or in the night when you do not need to drive your car. In fact, at the times when you replace the exhaust parts it is also preferred that you put some oil in the bolts which could protect them from the rusting as well.