Ct,f7,and powerpros are the same pipe just different names. The trinity is basically the same pipe also but the welds are different. I think the voulume dimensions are the same though. Dynoport and Lrd or other right bend pipes. The only one you can buy new is a Ct. The others you will have to keep an eye out for. Keep an eye out on E bay etc... but you have to tell you they go really fast so b quick if you want one.