Upgrade your B9 RS4 / RS5 2.9T EA839 with the cutting-edge APR Air-to-Water Intercooler System, revolutionizing performance for a notable increase in horsepower and torque. This innovative system outperforms the factory cooler, overcoming its limitations and ensuring unparalleled consistency.

The factory cooler's inadequacy to efficiently cool charged air leads to elevated intake air temperatures, triggering the ECU to safeguard the engine by limiting power output, whether in a quarter-mile sprint, track lap, or spirited drive. Seamlessly installing the APR System eliminates this bottleneck, unlocking an immediate surge in power and consistently maintaining peak performance.

Say goodbye to power loss due to heat-soak, as the APR system boasts exceptional heat dissipation capabilities. This ensures that your vehicle remains at optimal performance levels, even under demanding conditions. Elevate your driving experience with the APR Air-to-Water Intercooler System — where power, reliability, and consistency converge for an unmatched driving thrill.

Specs:

Discover the undeniable superiority of the APR Air-to-Water Intercooler System over the stock factory counterpart. This enhanced cooler boasts a staggering 194% increase in size, measuring an impressive 5,500cm³ compared to the undersized 1,870cm³ of the factory unit. The design features meticulously crafted cast end tanks, strategically optimized for computational flow to ensure a seamless airflow path. This system guarantees a perfect fit, coupled with all-new silicone hoses, equipped with EZ-flow stepped lips for flawless connections without disruptions.

Furthermore, the coolant hoses have been meticulously upgraded, incorporating application-specific routing for a clean and efficient installation. The optimized flow through the intake air path minimizes pressure drop, resulting in elevated post-cooler boost figures that contribute to increased horsepower, all while maintaining lower intake air temperatures.

The proprietary intercooler core sets new standards, excelling in efficient cooling and limiting head pressure on the coolant system. This innovative design promotes higher airflow with a reduced pressure drop through the charged air path. Remarkably, this system eliminates the need for expensive modifications to your coolant pump or radiator. Its capability to sustain constant intake air temperature, even during 28 consecutive 60-130 MPH pulls on the track, speaks volumes about its performance without compromise.

Testing:

APR's rigorous testing, featuring multiple consecutive 60-130 MPH acceleration trials on an Audi RS5, reveals the exceptional performance of the APR Air-to-Water Intercooler System compared to the stock cooler. In hot conditions (33°C/91°F), the stock cooler experienced aggressive power reduction, averaging 73°C over 14 pulls. In contrast, the APR cooler, operating without ECU power reduction, maintained an average of only 49°C over 28 pulls. The dramatic difference (+111% vs. +51% over ambient) highlights the APR system's ability to consistently deliver higher power levels, making the car quicker and more responsive.