Walnut Blasting Adapter Pair – Mini Cooper R55 R56 R57 N14 N18 Carbon Cleaner
N18 Engine • 2009–2015 Mini Cooper S Cabrio R57 • 2009–2013 Mini Cooper S R56 • 2009–2014 Mini Cooper S Clubman R55. MINI Cooper N14 and N18 engines are notorious for building up thick carbon deposits on the intake valves.