Custom Builder Kits set MagnaFlow apart from the competition and it's no wonder when you can build high end systems to fit your needs and not the other way around. Choose what you need and leave out what you don't and with all the accessories, hangers, and flanges you'll need all you have to do is design the system for you. Various diameters supported including 2.25", 2.5", and 3" diameters for J, U, and L-bends.