The Gen 4 Optimizer is the AFR+ Fuel Controller that combines an EFI controller with a wideband O2 sensor and AFR gauge to provide a user instant fuel trimming ability and feedback about their vehicle's state of tune. The AFR gauge allows you to know exactly how well your tune-up is performing at all times.
Kit Includes: AFR Guage, Wideband controller, and Bosch O2 Sensor
