Typically, this includes the pipe connecting the pipe from the catalytic converter to the muffler, the muffler, and the tailpipe or exhaust tips. Because these types of exhaust systems are installed after the emissions monitoring systems of a vehicle, they won’t impede its ability to measure emissions. However, you must be aware of your local noise regulations and adhere to them. With relatively short install times when using a high-quality system from MagnaFlow, exhaust modifications can yield the instant gratification of your ride sounding as fast as it looks. When you purchase an aftermarket exhaust system like a cat-back exhaust, you're in control of horsepower and sound output as pipe diameter and muffler type are in your hands.
The only difference is that it features straight perforated pipes. The original exhaust systems focus more on just reducing the sound and not shaping it to give it that desired deep growl. One function shared with both the axle-back and the cat-back exhaust systems are shaping your vehicle’s tone.
Considering cat-back exhausts replace more restrictions, they typically offer increased performance and noise compared to axle-back systems