i like the idea of a fuel cut defencer and the s-afc but i dont know if it will do me much good because i am only going to be running the stock turbos. the fcd sounds cool because at mvpmotorsports.com they have a warning that says dangerous levels of boost may be obtained and that sounds fun. just wondering if an fcd and an s-afc would be beneficial to stock turbos and if so how beneficial? also, i have seen those gray tail lights for the supra at suprastore.com and was wondering if they work on any mkiv supra? let me know if you have any info that would help.