Perrin Performance AccessPort for CAN based ECU 07-UP Subaru Legacy GT - P/N: PSP-ENG-918 Product Model: PER-PSP-ENG-918 The AccessPORT is a handheld programmer that allows you to unlock your vehicle's hidden potential by reprogramming the stock Engine Control Unit (ECU). Simply plug into your OBD-2 diagnostics port, and poke a few buttons, and in minutes you can upgrade the ECU in your car to gain 25-100+ Wheel HP. No cutting, wiring, or other such modifications, simply plug-and-play. The thing that sets AccessPORT out from the crowd, is the 'Real-Time' mapping, which allows you to change the tuning data within seconds, as opposed to minutes. Simply park, switch realtime, and resume driving, it's literally that easy. Off-the-shelf staged maps are available for download that will give as much as 50hp. For those wanting more, PERRIN offers custom tuned maps. With PERRIN custom tuned maps the possibilities are endless. With nearly any combination surrounding PERRIN parts, the AccessPORT can be ProTUNED to fit your cars special needs.