Tuning the Porsche 991 Turbo S is a quite impressive from a car that already has 560bhp from the factory. On these new SDI ECU cars, you cannot read the ECU out but only ID it to modify a matching stock file for performance tuning. Doing this requires speciality tools that work on the OBDII port to offer a true custom flash. Tuning the 991 Turbo S gives a tremendous gain from 560bhp to 615bhp. Add an exhaust system and you are over 630bhp. That is McLaren 650S territory! Check out the flashing photos below and the exhaust video. Shop all Porsche 991 Turbo Tuning Here Leave a Reply Cancel ReplyYou must be logged in to post a comment.