A component utilized primarily in vehicles, these replace the catalytic converter within the exhaust system. Designed as a straight-through pipe, they offer minimal restriction to exhaust flow. An example of their application is in motorsports, where maximizing engine output is paramount, even if it involves sacrificing emissions controls mandated for street vehicles.
Their importance lies in their potential to increase horsepower and torque by reducing backpressure. Historically, these were adopted in racing and performance applications before emissions regulations became stringent. A trade-off exists, however, as their installation eliminates the catalytic converter, leading to increased emissions and potential violations of environmental regulations.
