Since the first Kettering ignition system was introduced by Bosch in 1925 to replace magneto style ignition systems, the ignition coil has remained virtually unchanged. The familiar oil filled coil proved itself more than capable of providing a suitable high tension spark to keep pace with over 50 years of automotive development. However the rapid progress of automotive engine technology since the late 70's brought about the need for improvements in ignition system performance. So Bosch introduced the transformer coil. Bosch Australia has been supplying this style of coil as original equipment to the Australian vehicle manufacture's since 1987. We offer a range of coils from traditional oil filled to transformer and electronic to suit a wide range of aftermarket applications.