I have a 2006 kawasaki zzr600, I want to improve the sound quality of my bike‘s exhaust. so if I buy a muffler will it improve sound quality or I have to buy full exhaust system?
Slip-on pipes are designed to enhance the sound and have small effect on performance. I have heard of people doing a slip on upgrade and needing to adjust air intake or carbs but it's rare. I would say go ahead and swap out the can and see how she runs. if you start backfiring and stuff like that, you'll need to make some adjustments up front. A full exhaust will require some adjustments to air intake and fuel delivery.
Both will improve sound, the full system will improve more.
