Many consider the bench flash the easiest option, it requires you to be able to remove and install the ECM.  This option involves physical mechanical skills but does not require much technical knowledge.The flash tuner does not require physical mechanical skills but does require technical computer skills.  You will not need to do anything under the hood but will need a laptop, an understanding of software, and extreme care to follow the steps exactly or you could cause serious issues. Bench FlashThe bench-flash process will involve you removing the engine computer or ECM/PCM and shipping it to our warehouse.  Once we receive it, we will flash it for the modifications and ship it back with express shipping.  Once you get the ECM back you will just need to install it.  This whole process can take 2 weeks from you shipping your ECM to receiving it back. Flash TunerIf you purchase the flash tuner option we will ship you a flashing unit, you will need to download the software onto a laptop and connect the device between your laptop and the vehicle's OBD port.  You will then extract a copy of the factory calibration and email it to us.  We will modify the calibration and email it back to you.  You will then need to load the file onto the vehicle.  We cannot walk you through these steps over the phone but we do include detailed instructions that can easily be followed by the type of customers that would make these purchases.  If you are not fully comfortable doing either of these options, you will need to have a trained technitian take care of the work for you.