It doesn't come with a header at all, you have to figure that out on your own, or buy their weird one and an additional pipe.
I run a side pipe and I used a duratrax warhead header to give me decent clearance. Just using a LST2 pipe I snagged off ebay with it. I tried the pro-line high flow pipe that comes out the back and it's horrible compared to the side pipe. I also made my own throttle linkage wire. I used their guide and mounting plate, but used my own wire so I could use springs/collars/fuel line on it to give it a positive pressure when closed when at idle or when applying brakes.