Active Autowerke Header For Bmw E46 M3

BMW PERFORMANCE PARTS: ACTIVE AUTOWERKE HEADER for BMW E46 M3 Product Features:
Creates optimum flow and eliminates restriction Matched equal length runners delivers a consistent flow  Dyno Tested to provide improved HP and torque gains Made from 100% 304 stainless steel construction Available in a Polished or BRUSHED finish selection Designed for Street and/or Track Use  Bolt On Design with Precise Fitment  BMW OEM Style fitment  Complete hardware, includes all necessary gaskets and nuts Two year warranty The Active Autowerke BMW E46 M3 Header is designed to increase exhaust flow without losing power which can sometimes be a tricky proposition. These headers are developed to create optimum flow and eliminate restriction that rob much desired horsepower. Following the famed BMW E46 M3 CSL headers, each individual header runner of the Active Autowerke header is cut to a matched equal length to ensure a consistent exhaust scavenging (tolerance in lengths vary by bends to a mean average of 10-20mm).   TECH TIP:  The four oxygen sensors are temporarily removed to install the exhaust headers. Sometimes the exact placement of these sensors are not correct, resulting in a **CHECK ENGINE ** light. Active Autowerke has created a simple, efficient schematic diagram showing the exact placement with proper connections needed for a seamless re-install.   NOTE: HEADER SYSTEM IS DESIGNED FOR OFF ROAD USE AND RACING APPLICATION ONLY M3 WILL HAVE **CEL** WITHOUT ACTIVE AUTOWERKE SOFTWARE UPGRADE WILL NOT FIT RHD CARS.