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It's recommended that you order one of these if you have an AFR (Air to Fuel Ratio Sensor) or broadband O2 sensor on your car.
Some cars 2002 and newer, and even more of the cars that are newer than 2005 might benefit from this plug-in component, added to the 3X Optimizer for best results. If your car is newer than 2005 it would be a good idea to add this item to your shopping cart when ordering your HAFC kit, so that the mechanic who installs your kit will have it if he needs it.
Simplifies the Optimizer 3X to make tuning the MAP sensor and temperature sensor easier. Highly recommended for cars newer from 2003 on, with AFR type O2 sensors.
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