The Walker pipe is made out of aluminized steel and drawn around a 6"radius
The Vibrant pipe made out of some kind of stainless steel and is drawn and pushed around a 3" radius
thats not even a real comparison if you ask me,the difference in what kind of equipment and quality of the steel tubing that is needed to make that bend with a 3" radious is quite different to the one used on the larger radius and an awfull lot more expensive. that 3" radius is a crazy thight bend if you ask me,but could come in handy if you have long mufflers.