Bosch DuraSpeed sheathed-element glow plugs heat up more quickly and retain their glow longer, ensuring that modern diesels are instantly ready to go - even at temperatures as low as -28 degC. A controlled post-glow phase ensures low emissions and a quiet engine, whilst intelligent energy management relieves the strain on the electrical system and battery. And as a systems provider, Bosch guarantees that every sheathed-element glow plug operates seamlessly inside the engine management system.