In this video, we compare a stock exhaust to an aftermarket exhaust, to see what the differences are and why they sound different. A stock exhaust, or OEM exhaust, needs to meet the government emission norms which is why they tend to sound a lot softer and less aggressive. However, an aftermarket exhaust does not specifically need to meet any regulation, except for safety, which is why those manufacturers have the freedom to design the exhaust the way they want. To know more and what goes on ins