There is no pipe on the market that can match the torque of a 2 into 1 pipe or low end gains of a 2 into 1 pipe up to 8000rpm. These pipes rock for mx, and technical riding. You have to decide what your riding style is before you get a pipe. I have run the 2 into 1 pipe on a recreation ported shee in the dunes. It was fast up the hill and wheelied like mad with a +4 on it. As for custom pipes, www.thepowerpros.com is the hook up there. Power Pros made me a set of mached cpi pipes that were improved upon for more mid range gains. They work pretty awesome and they db'ed at 92db's.