Weistec Engineering - High Flow Air Filters - Mercedes-Benz M157 & M278 Biturbo

These Weistec filters are compatible with the 5.5 Biturbo and the 4.7 Biturbo (M157 and M278 engines). 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 and Weistec High Flow Air Filters is recommended. Features: - Adds 5-20 Horsepower - Increased Flow Area - Optimized Airbox fitment over factory filter - Amplifies the performance of your Weistec ECU Tune - Set of 2 Models Supported 2012+ CLS550 / CLS63 AMG 2012+ E550 / E63 AMG (Sedan and Wagon) 2012+ S550 / S63 AMG 2012+ CL550 / CL63 AMG 2012+ ML550 / ML63 AMG 2012+ SL550 / SL63 AMG 2013+ G550 / G63 AMG