This aftermarket automotive component replaces the catalytic converter within an exhaust system. Typically constructed from stainless steel or aluminized steel, it features a 2.5-inch diameter to facilitate increased exhaust gas flow. As an example, a modified vehicle intended for off-road use might incorporate this device to enhance engine performance.
The incorporation of this part can yield improvements in horsepower and torque due to the reduced backpressure in the exhaust system. Historically, individuals seeking greater engine output have employed such modifications. However, removing or replacing a catalytic converter can have significant environmental consequences and may violate local, state, or federal emissions regulations.