Cold Air Intake for BMW M3 E90 E92 E93 (2007-2013) 4.0L EngineHigh Flow Carbon Fiber Intake for 2007 2013 BMW M3 (S65 E9X) What it Does: Replaces the restrictive OEM air box lid and filter with a high volume 6 inch carbon fiber intake tube and cone filter to reduce intake temperatures and increase mass airflow into the S65 V8. The Stock M3 Air Flow Restriction The factory E9X M3 intake system, while adequate for stock output, utilizes a restrictive plastic air box lid and a dense paper panel filter. This