So you don't think your Saab is quick enough from 60 to 100? Then maybe nitrous oxide (NOS) is something for you. You will probably need to buy new front tires every second week and maybe a new engine every second month, but then you get this kind of acceleration:
Wow!
If sitting in that car doesn't make your tummy tickle then you better get a Saab JAS 39 Gripen fighter jet instead.