IE Polymer Air Intake, Audi B9/B9.5 S4 & S5 3.0T

IE Cold Air Intake System for Audi B9/B9.5 S4 & S5 3.0T

The Integrated Engineering Cold Air Intake System is engineered to improve airflow, throttle response, and induction sound on the Audi B9 and B9.5 S4 and S5 3.0T. Its one-piece rotomolded polymer airbox maximizes internal volume while providing excellent heat resistance, ensuring cooler and smoother airflow to the turbocharger.

The system flows up to 37% more air than the factory intake. When paired with the IE Turbo Inlet Pipe, total airflow increases by up to 61%, supporting gains of up to 19 HP and 21 lb-ft on tuned vehicles.

Features

• One-piece rotomolded polymer airbox
• Up to 37% more airflow than the factory intake
• Up to 61% more airflow with the IE Turbo Inlet Pipe
• Up to +19 HP and +21 lb-ft with ECU tuning
• Integrated velocity stack for optimized airflow
• Large 5″ high-flow air filter
• Improves turbocharger and engine efficiency
• Enhanced turbocharger and engine induction sound
• Dual-pressure intake design utilizing high- and low-pressure air zones
• Compatible with factory and hybrid turbochargers when paired with the IE Turbo Inlet Pipe
• Premium stainless hardware, multi-ply silicone couplers, and powder-coated aluminum components
• Direct bolt-on installation using factory mounting locations

Technical Information

The airbox is manufactured using a rotational molding process that creates a seamless housing with consistent wall thickness and superior heat resistance. The integrated motorsport-inspired velocity stack provides a smooth transition from the large 5-inch air filter to the turbo inlet, reducing turbulence while maximizing laminar airflow.

Performance

The intake system increases airflow by up to 37% over the factory airbox. When combined with the IE Turbo Inlet Pipe, airflow increases by as much as 61%. On tuned vehicles, this combination can deliver gains of up to 19 HP and 21 lb-ft while improving throttle response, turbocharger efficiency, and induction sound.

Installation

The system installs directly using factory mounting locations without permanent modifications. It is fully compatible with the factory turbocharger and can later be upgraded for hybrid turbo applications by adding the IE Turbo Inlet Pipe and the appropriate adapter ring.

Notes

The IE Turbo Inlet Pipe is an optional upgrade and is sold separately. Hybrid turbo adapter rings are also sold separately. Pairing the intake with the IE Turbo Inlet Pipe provides the high airflow and performance potential.

Compatible Vehicles

Audi B9 S4 3.0T
Audi B9.5 S4 3.0T
Audi B9 S5 3.0T
Audi B9.5 S5 3.0T