The MultiAir technology is very flexible in terms of application to internal combustion engines and also has significant potential for application to Heavy Duty (HD) diesel engines (with displacement above 1 litre) used in both commercial and offroad vehicles, such as agricultural and construction equipment. In light of increasingly restrictive regulations to be introduced on heavy duty engines for both on-road (Euro VI and EPA 10) and off-road vehicles (Stage 3B/Stage 4 and Tier IV) over the next few years - in particular, the requirement to comply with limits on nitrogen oxide (NOx) emissions, which will be reduced 80% over current limits - it will be necessary to adopt after-treatment systems for NOx emissions that are significantly more efficient than those currently in use. The application of MultiAir technology to heavy duty diesel engines will reduce consumption of both fuel and urea (necessary for the functioning of the SCR system (consisting of tank, line and dosing valve), which represents a significant cost factor for off-road vehicles, for example. In 2009, the Group launched a project to apply MultiAir technology to one of the Cursor family engines in an effort to obtain an initial evaluation of its potential benefits by the end of 2010. This prototype application has also been designed to be fully compatible with the CNG (Compressed Natural Gas) version of the engine, where the benefits of the MultiAir system have already been demonstrated.