Designed specifically for the BMW/Peugeot N18 engines, (Cooper S 2011 onwards, JCW Cooper S 2013 onwards, R58 Coupe 2012 onwards, Peugeot 208 GTi late 2012 onwards includes the Sport model, RCZ THP 156 & 200 2011 onwards). This product is either recommended where the boost pressure has been increased by an ECU software upgrade or simply as a solution to the many failures that have occurred.