What is a cat back?

A cat-back is a type of aftermarket exhaust system that is designed to replace the stock exhaust system on a vehicle. It includes all of the components from the catalytic converter back to the exhaust tip, hence the name "cat-back". The main purpose of a cat-back exhaust system is to improve the performance of the vehicle by increasing the flow of exhaust gases. This is accomplished by using larger diameter piping, less restrictive mufflers, and sometimes a different style of exhaust tip. Additionally, a cat-back exhaust system can provide a more aggressive exhaust note compared to the stock system. It is a popular upgrade for enthusiasts who want to improve the performance and sound of their vehicle.