Much like the driver, your car or truck needs to breathe. Your air intake is its nose, your engine block is its lungs, and the exhaust manifold is kinda like its sinuses. If your sinuses are obstructed, you don't feel good because your body isn't drawing in or exhaling air like it needs to perform at it's best. Your car is the same way and it's stock exhaust is literally choking it. Perform sinus surgery on your vehicle and install a new performance exhaust system for your car or truck,
A performance exhaust system, including headers and a new full catback exhaust, will decrease back pressure creating an easier flow of air through your intake and exhaust system. This increases horsepower, improves throttle response, provides a higher fuel efficiency, and can make your car or truck sound really cool with a more aggressive rumble come from your tailpipe.