The Spider® petrol and diesel tuning system is available for all Audi diesels both common rail and Pumpe Duese engines. Installation is plug and play on all engines. Listed below are the Audi models covered with dyno proven before and after performance figures. Once the petrol or diesel tuning system is fitted, performance of your Audi will be crisper, flat spots will be replaced with much more low end torque. Smoothness on acceleration is another added benefit of our tuning system.