I emailed Burger Tuning, as I have owned several BMWs in the past and used their tune/methanol injection system on my 335i, inquiring if they anticipate that their tune will work on the Supra. To my delight they stated that, “We predict and expect our B58 JB4 to be compatible on it, if not, it should be with some small tweaks.” If you are not familiar with their tunes you should check out burgertuning.com. I have nothing but great things to say about the customer service, quality of product and support they provided me in the past. (Not affiliated in anyway other than a past customer) They currently make tunes for BMW, Mercedes, Maserati, Audi, Porsche, Lexus, etc... Their current B58 tune adds 60hp (to wheels) on pump gas with no other mods, ability to read/clear codes, and change maps on the fly. The link below shows dyno results and some vids of the tune in action. http://www.burgertuning.com/B58_JB4_bmw_performance_tuner.html I understand the hesitation in tuning a car under warranty, but I am foolish enough to ignore my better judgement. Enjoy!