Unitronic® is proud to release its Intercooler Upgrade for the B9 Audi® S4® and S5® equipped with the 3.0 TFSI® EA839 engine. This direct OEM replacement bar and plate intercooler provides a dramatic reduction in charge air temperatures to ensure peak performance is achieved and sustained while resisting heat-soak after repeated efforts and in harsh climates and conditions

Consistent with all of its performance products, Unitronic utilizes only the latest industry-leading tools, equipment, and computer-aided design software that are packed with the latest technology from our technology partners at Creaform® and Stratasys®. These tools and technology help to achieve a design that not only optimizes thermal efficiency but airflow to maintain the least amount of pressure drop, while fitting within the space constraints without affecting the frontal crash bar assembly or other components behind the front bumper.

design and Engineering begin with the evolution of the design in meeting the objectives. Criteria from a top-level are first met with the platform's design constraints; breaking it down to the details in optimizing the design. With upfront engineering fluid dynamics (EFD), Unitronic is able to hone in and refine the areas that are most effective in meeting those objectives.

Using EFD simulations, Unitronic is also able to predict the thermal exchange of the intercooler core in the wake of air passing through the channels. This provides further information on how our design will impact the efficiency of the engine and a/c radiator.

Unitronic's bar and plate intercooler core feature a unique staggered and louvered fin configuration to maximize efficiency, significantly reducing charge air temperatures allowing for cooler, more dense air to be inducted by the engine; ultimately resulting in an increase in engine performance.

When intake air temperatures reach a specific threshold, the engine control unit begins to compensate to account for the air temperature, resulting in a decrease in performance. Unitronic's core measures 21.65” x 16.61” x 2.52” (550.0mm x 421.9mm x 64.0mm), a 79% increase in volume over stock, allowing for a greater volume of air to exchange heat, which, combined with a proper fin configuration, allows for maximum efficiency and reduction in heat-soak thresholds without producing a significant pressure drop.

The ambient air temperature was stable at 43°F (6°C) throughout the day. Testing consisted of 6 consecutive dyno pulls with a 20-second pull and a 30 second cooldown period in between runs, with both the OEM and Unitronic Intercoolers to collect intake air temperatures to provide data on cooling abilities, efficiency, and resistance to heat soak compared to the OEM unit.