The factory-installed intake boot on the E46 M3 uses a ribbed design, connecting the air box and intake manifold at a severe angle.
The result is an obstruction and misdirection of airflow, creating turbulence that effectively minimizes intake plenum volume.



Click HERE to order your E46 M3 ECS Silicon Intake Boot




Time to replace the air filter to? Their is no better time than now.

Click HERE for your ECS E46 M3 Silicon Intake boot and Pipercross Performance Dry Foam Air Filter

Click HERE for your ECS E46 M3 Silicon Intake boot and Mann Stock Replacement Air Filter