If the EZ Acty Exhaust isnt for you this is the piping and flange that I use. 1.5in piping all the way through to keep a less hollow tone which comes with larger pipe ID. The piping is aluminized but coating the piping and flange is recommended to prevent rusting. This is made to help with making your own exhaust for your Acty, this is not an exhaust system. If you want modifications for the piping get in contact with me.