Performance exhausts are a great way to improve the power, and sound of your car! Even with just a sports exhaust back box, your car can sound like it means business and have a noticeable improvement in power. For the maximum power increase though, a full exhaust system is the way forward. Sports cat, or de-cat pipe (not road legal) and tubular manifold give further power gains. Free flowing exhausts get the gases out of the engine quicker, and help improve power and acceleration, especially at higher revs.