Wide Band O2 sensor and control box. It will plug directly into the PCV or PCVI and allow automatic fuel adjustments. It can make a map for each gear (basic settings would make one map for all gears). Each map cell is individually adjustable so you can specify an exact AFR value for each area if needed. Note: Requires Power Commander 5 or Power Commander 6, available separately. Note: This kit includes two O2 sensors and is designed for models that have 2-cylinder engines.