This 991 Porsche Carrera S is a car that has been gaining popularity on the road and for good reason. These cars drive smooth and respond instantly with “I can’t believe its not butter” like power delivery. In true Porsche nature these cars handle exceptional to boot. So how could someone possibly have a reason to modify to make something nearly perfect to being with? The modern day Porsche’s already come equipped with sport mufflers and valve-tronic type systems with electronic and vacuum control to change the sound and tone of the exhaust based on throttle input.