APR Air-To-Water Intercooler System for Audi B9 RS5 2.9T | IC100028

The APR Air-to-Water Intercooler System (IC100028) is the definitive solution for the Audi B9 RS4 and RS5 2.9T cooling limitations. The factory intercooler is significantly undersized for the 2.9T EA839 engine, leading to rapid heatsoak and high intake air temperatures (IATs) that trigger the ECU to pull power for safety. The APR system addresses this with a massive 194% increase in core volume, providing 5,500cm³ of cooling capacity compared to the meager 1,870cm³ factory unit. This results in consistent horsepower and torque delivery, whether you are on a drag strip, a road course, or a spirited mountain drive.

Engineering excellence is at the core of this system, featuring CFD-optimized cast aluminum end tanks and a proprietary aluminum cooling core. The system is hand-assembled with CNC-machined and TIG-welded components to ensure maximum durability and pressure resistance. It includes application-specific "EZ-Flow" charge air hoses and coolant lines for a perfect fit, all while remaining 100% emissions compliant and requiring no specialized ECU tuning to function.

Features:

• Massive Cooling Capacity: 194% larger than the factory intercooler (5,500cm³ vs 1,870cm³).
• Performance Consistency: Dramatically lowers IATs and resists heatsoak to prevent ECU power reduction.
• High-Flow Design: Outflows the stock unit at every measured pressure differential, reducing turbocharger strain.
• Superior Construction: CFD-optimized cast aluminum end tanks for smooth internal airflow and maximum strength.
• Complete Hardware Kit: Includes CNC-bent brackets, laser-cut hardware, and application-specific silicone hoses.
• No Tuning Required: Safe to use with factory or aftermarket software as a direct "bolt-on" upgrade.
• Emissions Compliant: Does not modify or negatively impact the vehicle's emissions systems.

Technical Specifications:

Installation Instructions