The exhaust tip is a component of the exhaust system which is the point where the exhaust gasses exit the system into the open air. Because of this, the size and shape of the tip will affect both the sound and pressure of the exhaust. However, sometimes exhaust tips (especially chrome plated and/or larger diameter tips) will be purchased solely for aesthetic reasons.
Exhaust Tip Styles
Many bolt-on exhaust tips are designed mostly for aesthetics, so they are an inexpensive way of improving the vehicle's looks quickly.