1 Stress: Besides causing muscle tension, stress can cause chest pain. 2  Figure out what is causing you stress, and cut it out of your routine if possible. 3  Breasts: As your pregnancy progresses, your breasts will become larger. 4  This can cause shortness of breath or chest pain.
An exhaust system is usually piping used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system design, the exhaust gas may flow through one or more of:
Diesel Exhaust Fluid (DEF) is  an emissions control liquid required by modern diesel engines. It is injected into the exhaust stream. DEF is never added to diesel fuel. It is a non-hazardous solution of 32.5% urea in 67.5% de-ionized water. DEF is clear and colorless, and looks exactly like water.