AEM X-Series OBDII Wideband UEGO AFR Sensor Controller Gauge Schrader Removes any downpipe restrictions for

Removes any downpipe restrictions for full available power

INVIDIA CATTED DOWN PIPE

Too much low speed rebound damping can have an adverse effect on grip

BMW - 3 Series - E90 - 2004 - 2013 - RWD - FL

AEM X-Series OBDII Wideband UEGO AFR Sensor Controller Gauge Schrader Removes any downpipe restrictions forAccurate AFR data is critical when tuning an engine. Running rich (very low air fuel ratio, excessive fuel) can cause a loss in power, while running too lean (very high air fuel ratio, not enough fuel) may result in serious engine damage. Using a wideband air fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency. AEM has a comprehensive line of highly