Defi is a brand name for aftermarket products used by Nippon Seiki which manufactures, supplies gauges and displays in vehicles. Nippon Seiki has designed and produced automobile instrument clusters for over 60 years. They supply instrument panels for the world’s sports and specialised vehicles. F1 drivers and motorcycle racers put their confidence in the accuracy and performance of Defi products. They are continually seeking innovative ways to produce state-of-the-art technology for Defi’s aftermarket products.