Exhaust systems vary depending on their intended use. Street legal exhaust systems are government regulated for emissions. Racing exhausts don't have the same restrictions which allows for customizing to increase horsepower and limit weight. The lighter the car, the faster it goes. The less restrictive the exhaust system, the more horsepower that can be produced by the engine. Zero In Racing has exhausts for every application, along with individual components like mufflers, tips, catalytic converters, catbacks, dowpipes, connecting pipes, downpipes, exhaust gaskets, brakes and more.