Description Reviews Manifold/Catalyst for MINI Cooper S Traditionally thought of as a downpipe combined with a new higher-flow header (manifold) all mated up to a new Platinum-coated 200-cell German-made catalyst. A 1-2-3 punch for big performance. The stock manifold/downpipe/cat is the biggest bottleneck in your exhaust system. An easy bolt-on installation that comes with all needed hardware & gaskets that need replacing. Removes the pre-cat for higher flow. Can be installed with your stock exhaust or with a Milltek Sport unit (or any other aftermarket exhaust). Look at the difference between the stock and Milltek unit and you will SEE why you will now make power with Milltek.