From the looks, those pipes will come out of the header if you remove the springs. so those springs are holding the pipes in. My motorcycle has 2 springs on the pipe (aftermarket) holding it onto the S pipe. I would guess that you can remove all the pipes from the header to ease installation....bolt it up to the head, then slip each pipe in one at a time. would be a hell of a lot easier than trying to snake it into the engine bay.