do88 performance intercooler developed for Audi S4 B9!

The do88 performance intercooler is developed to significantly improve the charge air cooling and airflow for the Audi S4 B9. By making better use of the available space, we have achieved a much larger core volume and cooling area while maintaining an easy installation.

Significant advantages with do88 performance intercooler (Audi S4 B9 OEM intercooler):

• Greater core volume: 16630 cm³ (8410 cm³), 98% larger!
• Larger active cooling area: 2918 cm² (1051 cm²), 178% larger!
• Airflow at XXX bar / XXX psi pressure drop: XXX CFM (XXX CFM), XXX% higher!
• Post-intercooler air temperature at same conditions: XXX°C (XXX°C), do88 XXX°C lower!

The original intercooler core measures 720 × 146 × 80 mm, while the do88 core measures 618 × 472 × 57 mm. Instead of simply increasing the core depth, we opted for a much taller core. Active cooling area is crucial for efficient heat transfer. This increases the active cooling area by 178%. While the core is thinner, the volume is still 98% larger, which has a positive effect on airflow. The design of the end tanks is also an important factor here.

As with all do88 performance products, the intercooler is developed to find the best balance between cooling efficiency, airflow and fitment.

Performance testing is planned for spring 2027. Proper intercooler testing requires suitable and repeatable ambient conditions, something the Swedish cold winter is not particularly good at providing! Once temperatures rise, we will put the intercooler through our full testing procedure and publish the measured airflow and intake air temperature results here.

The do88 performance intercooler comes with the necessary parts for installation, including mounting hardware and installation instructions.