MagnaFlow's stainless steel ball flanges to help you turn any system into a truly bolt-on system. Each kit comes with a male and female end that connects to one another, while the other ends can either be clamped on or welded onto your existing sections. By incorporating a MagnaFlow universal ball flange kit, the installation and removal of your system is simplified by breaking your system up into smaller sections. MagnaFlow's universal ball flanges are available in 2.25", 2.5" and 3" inlet/outlet diameters and are backed by a lifetime warranty.