Complete Hövding CC invisible bicycle helmet which is available online and at shops in Europe. We absolutely love the story of Swedish industrial designers Anna Haupt and Terese Alstin and Hövding, their invisible bicycle helmet.
Cummins QSK60 2-Stage Turbo system uses 4 turbos instead of the traditional 2 (two separate systems, each system has two turbos). In a line, the first stage turbo remains to be a traditional low-speed efficient turbo. This turbo feeds an additional high-speed turbo, which increases airflow into the engine.