Standard bore LCB (inch and three quarters internal diameter) for post 1990 cars with catalyst that is ideal for for standard to high performance 1275s and for street 1380s. The best quality production manifold is made by Maniflow. The Long Centre Branch design has been proven to be the best all-around for our 5 port cylinder heads. Bore diameter being the only other variable. This manifold comes with the link pipe when the catalyst is to be retained for fuel injection cars. Suitable for fitment to single and twin point injection Mini's.