Sportec Audi S5 "Stage One" Upgrade

And another piece of news regarding the car manufacturer Audi. If you happen to own (or plan to own) an Audi S5 model (at least from 2009), then take a look at what Sportec has in store for it: a "Stage One" upgrade for both the quattro coupe and the cabrio that use the V6 3-litre supercharged engine....