Genuine Maniflow "Long Center Branch" header for carbureted Minis. This 1 3/4" header is recommended for mild to mid range 1275 engines using cams up to 286-290 durations, or on very high flowing small bores. For use when installing a full new exhaust systems. This header is best used in conjunction with our range of RC40 exhaust systems, such as WC-RC40PACKAGE001. 
 
Does not fit Minis using rubber or Quinten-Hazel couplings