The Long Center Branch ("LCB") design has stood the test of time and is the best all-around exhaust manifold for the A-series engine. Ideal for all 1275s and big bore street-driven classic Minis. This high-quality C-AEG365 LCB header is made in England by Maniflow, with precise welds and careful design of the collectors, and should not be compared to so called "budget" LCBs. Three-piece design for easy installation. Collector is 1.75" I.D.