Abstract: The apparatus would include a body portion positionable intermediate the exhaust manifold and the muffler or the catalytic converters if the car is adapted with such, so that exhaust gases, under a first condition, can flow through the body portion and into the muffler prior to exiting to atmosphere, and under a second condition, via the removal of a plate member, a greater portion of the exhaust gases would be exhausted directly out to atmosphere bypassing the remainder of the exhaust system including the muffler and/or catalytic converter.