They are a custom set of equal length headers. They are designed to prevent #5 and #6 cylinder from overheating. This is the only set as of yet and they haven't been tested. I am still in the process of test fitting them. Jim Nixon (NONE) is going to be running the same setup. He has a few ticks up his sleeve too, but I will let him tell you about them! We are hoping to be able to offer a complete turbo setup which produces as much or more hp as the TD05 kit but, for much less dinero: ) This turbo setup on my car is expected to produce somewhere around 800-900hp. I will be running the border 850cc. injectors... Michael