My bro has a '88 MX-6 GT Turbo...he has done a few aftermarket mods like an MSD ignition and a chip...the rest is stock or he tuned it or made parts. He does all of the work on it.
Some cool parts he has are a factory Mazda CD-player(for the MX-6, which is pretty rare), 626 5 door GT wheels painted gunmetal grey(look great on the shiny black car), a factory Mazda grill with driving lights from Holland, a factory Mazda digital dash from Canada, and a few other things.
Last I heard, he ran a 13.8 at like 97mph. Gateway Raceway has drag testing every Thursday for like $15 per car.
The MX-6 has a good ride quality, but when my bro wants to race someone or go flying down an exit ramp, it's great. We've raced many people at stop lights, and we always win and it's funny cause the car looks stock except for the wheels and grill so people think it's slow, but in 2nd gear if you floor it it will skid.