AEM X-Series Inline Wideband UEGO Controller 2010-bmw-335i-base-esi4209021 This is the most complete

This is the most complete kit available on the market straight out of the box- no additional parts required

This air intake system was developed to accommodate the engine's factory emissions control devices including the air temperature sensor

not for ECU calibration

Certified to ISO 8846

Valved System (retains factory exhaust modes)

AEM X-Series Inline Wideband UEGO Controller 2010-bmw-335i-base-esi4209021 This is the most completeWhen tuning an engine using wideband AFR feedback control on an inertia dyno, deadtime affects the data you are looking at because it is reported in a different operating location than when it actually occurred. This means with long deadtimes, whatever changes you make to the base fueling will likely be in the wrong location. This can be particularly dangerous to high compression and high boost forced induction vehicles, and EFI systems that use