The header on this Midget is different for a number of reasons. You'll notice that the collector is a two-into-one design. Two primaries are routed into one collector which is then routed into another collector. You will also notice that the pipe is chromed, which looks really great but many of the leading manufacturers of headers are not too excited about. This set of headers also has some volume added to the primary tube in the form of larger diameter tubes that run for several inches then revert back to the original tube size of the primary. This additional volume is an attempt to improve the scavenging effect of the header.