AUDI S4/S5 B9 Heat Shielded Downpipes | PW Motor b9.5 where mass airflow sensors are

where mass airflow sensors are involved and get damaged over time by oiled filters

As high-pressure pumps advance to fully support DI fueling

It ensures a perfect seal

optimizing engine efficiency and performance in all driving conditions

AUDI S4/S5 B9 Heat Shielded Downpipes | PW Motor b9.5 where mass airflow sensors areUpgrade your AUDI S4 S5 B9 to new levels of performance with PW MOTOR heat shielded Downpipes. Designed with sophisticated CAD modelling tools to ensure high flow and a perfect fit. With a range of diameters from 4. 5 to 5 inches depending on the application, are replacing the OEM downpipes, Laser cut brackets to fit onto the OEM provided mounting points. Completely assembled and TIG welded with love from experienced hands. Key Features of AUDI S4 S5