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Performance headers are car components that, as his or her name implies increase the performance from the car. To understand them let us first find out how the engine powers your car or truck. The power reaches your car by means of chemical energy kept in the unburnt fuel. It is the auto engine that converts this chemical energy through combustion into mechanical energy and by having a various linkages reaches this mechanical energy on the wheels which drive the vehicle. The body builders and also the athletes take these steroids through injections to gain energy and strength. However, you should be mindful that while using the injections you have to inject the syringe into your muscle rather than blood veins and the syringes must be new and free of all the infections. The users must take some precautions to keep you protected from any future damage.