JB4 Tuner for 2012-2018 Audi S4, S5, Q5, A6, A7, A8, Q7 (3.0T Only) - Burger TuningGains starting at 45hp and 65ft lb The JB4 is an easy to install plug and play tuner that attaches to sensors in the engine bay and works with your factory ECU tuning to remap boost, timing, and fueling for optimal performance. Includes full CANbus allowing the JB4 to access and incorporate all engine data in it's tuning strategies, incorporate unique safety features such as keeping boost pressure low until oil and water is up to temperature to