These Weistec filters are compatible with the 4.0 Liter Biturbo (M177 engine) for the W213 chassis E63S. When analyzing the factory airbox and flow characteristics we found the placement of the filter in the box to be a significant restriction. Improvements in filter shape and positioning, combined with our very own high flow element provides a significant flow and power increase across all ranges of the engines power band.
For maximum results, the combination of our Weistec ECU flash is recommended.
Adds 5-20 Horsepower
Increased Flow Area
Optimized Airbox fitment over factory filter
Amplifies the performance of your Weistec ECU Tune
Set of 2
Recommended for the Weistec High Flow Air Filter Set, M177 W213 / W222